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Ford Performance 4.10 Gears and BAMA X4 Tuner (99-04 V8)

Market Price $699.99 You Save 11% ($80.00)

$619.99

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  • Item 101661
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Features, Video & Details

  • Money Saving Combo Kit
  • Bama SF4/X4 Tuner with 3 Custom Tunes
  • Free Tunes for Life
  • Ford Racing 4.10 Gears - 8.8"
  • Motive Gears 8.8" Rear End Installation and Bearing Kit
  • 2 Quarts Royal Purple Max Gear 75w90 Gear Oil
  • 1 Quart of Ford Racing Friction Modifier
  • Includes datalog reviews to ensure your vehicle is fully optimized
  • Free Personalized ID Plaque (Pictured Above)
  • Fits 1999-2004 V8 Mustangs

Review & Installation Video

Review & Install Video

I’m Justin with AmericanMuscle.com, and this is our acceleration pack bolt on build up for all 99-04 Mustang GTs. The focus of this pack is of course acceleration, but in order to accelerate faster you need traction, and lots of it. That’s why the majority of the parts used for our build today are focused on getting us off the line much quicker, ultimately resulting in faster acceleration. But before we go over all the parts we have in store for our 2000 GT here, let’s get it out of the shop and do a quick 0-60 baseline run, just to see where we stand now. Alright, before we go installing all of our parts for the acceleration pack, we’re going to do a baseline 0-60 run, using our iTSX wireless tuner and my iPad here, just to see where the car stands now, so hit start and here we go. Alright so it looks like we just clicked off a 6.66 0-60 time with our automatic 2000 GT, which is pretty average for this model car. Now we’re going to take our car back into the shop, talk a little bit more about some of the parts we have in store, and get them installed. Since traction is the theme of the day, what better way to get more of it, than by using a set of these NITTO NT555R Drag Radials, those large tread blocks paired with that real soft compound is going to give us a ton of grip both on the street and at the strip, and should really help our GT get off the line. To further help our GT hook we decided to go with some vital suspension components from QA1, starting with these box style rear lower control arms, these bars are a variation of the classic traction bar design, and basically help keep the rear axle from moving around under load, and especially on hard launches, eliminating any excessive wheel hop. We also decided to go with a set of these QA1 adjustable rear upper control arms, that are fully adjustable while still on the car. These are going to be key to adjusting our pinion angle which is not only important for traction, but also for driveline smoothness. These are really going to help firm up the rear end of the car, and eliminate any side to side sloppiness or wiggle, making the car track a lot straighter, and just making for an overall better driving experience. Moving away from our traction and getting into another big contributing factor to our acceleration, that’s right our gearing. From the factory, our automatic 2000 GT came with 3.27 gears, which is pretty weak for acceleration. That’s where these Ford Racing 4.10 gears come into play, simply put, that shorter gear ratio is going to help our car accelerate faster. Quite frankly, I’m quite anxious to see how it’s going to wake up our 2 valve motor. So now that you know what we have in store for our GT, we’re going to hand the car over to the crew and get everything installed, after they’re all done we’re going to take our GT back out on the street, just to see how it behaves on the road, and to see if we’ve improved on our 0-60 time. Alright so we’re out here on the street with our 2000 GT, we just had the acceleration pack installed by the guys back at the shop, and we’re just cruising, I mean the car is very mild mannered, we’re in overdrive, you’d never be able to tell there’s gears in the car, until you do a little squeeze on the throttle, and man does it go. It goes, it goes, and it hooks hard too. I mean we didn’t even have a chance to heat cycle the tires there and it just dead hooked on the street. Car is a little stiffer in the rear, that’s attributed to the stiffer bushings in both the QA1 lower and upper control arms, but that’s going to be a good thing, that’s going to help keep the car straight, going down the track, it’s also going to reduce our wheel hop as well, and overall just improve our acceleration. So now we’ve had the chance to drive the car around on the street a little bit, see how it reacts in everyday situations, we’re going to put it to the ultimate test, get it back to the shop, do a hard launch, and see if these parts work in lowering our 0-60 time. Alright, so we just finished up our second 0-60 run, and we just clicked off a 5.09 second 0-60, that’s over half a second off our baseline number, so it’s easy to see our acceleration pack is doing its job, and I’ve got to admit, those radials definitely helped us hook on the pavement. So that does it for the acceleration pack, be sure to check out our other 99-04 bolt on build ups where we make our GT handle a bit better, we give it some more power, and dress it up a little bit.

Bama Performance The Gears
The Gears

Improve ET's and Low End Torque. Installing a set of steeper rear gears is a great way to get more low end grunt off the line and lower your ET's at the same time. Ford Racing Mustang ring and pinion gears feature a super strong forged construction, CNC cut & lapped gear teeth, and a black oxide finish to resist corrosion making them perfect for street, road, or race use. More info about these gears - Here

The Tuner
The Tuner

Power. Performance. Personalized. The SCT Power Flash Tuner features Bama Performance custom tunes that are written specifically for your Mustang. Our tunes are based on a 19 point questionnaire to deliver the most power and performance possible for your Mustang’s modifications. All Bama Performance tunes are tested and proven on our very own in-house Dynojet 224xLC Chassis Dyno. More info about this tuner - Here

The Combo
The Combo
  • More horsepower and torque
  • Better throttle response
  • Enhances existing modifications
  • Custom Dyno proven tunes
  • Free Tunes for Life
  • Free personalized ID plaque


Technical Note. Installation costs will vary, but a good rule of thumb is between $250 and $300. Be sure to work with a reliable shop that you trust for installations. You can also save money on your installation labor by having your Trac-Lok rebuilt at the same time as your gears are installed, see drop down option above.

**NOTE: Programming custom tunes may take 2-3 business days plus applicable shipping time. We recommend ordering other products separately to avoid delay. Heavily modified cars are not tunable with a mail order tune. Click for restrictions. Membership in the Tunes for Life program is is valid for as long as you own the car that was originally tuned and is non-transferrable.

Fitment: 1999 2000 2001 2002 2003 2004 Details

What's in the Box
  • (1) SF4/X4 Power Flash Tuner
  • (1) One USB PC Interface Cable
  • Ford Racing 4.10 Gears
  • Motive Gears 8.8" Rear End Installation and Bearing Kit
  • (2) quarts Royal Purple Max Gear 75w90 Gear Oil
  • (1) quart of Ford Racing Friction Modifier
  • Free Tunes For Life
Installation Info
Tech Specs
Bama Custom Tuning at AmericanMuscle. Power. Performance. Personalized. Proven
Ordering a Custom Tune?Whether it's a new mod or just an octane change on your existing tunes, our Bama Performance calibrators have got you covered in a few easy steps:
  1. Buy this Tuner & Submit your Mustang's Info
  2. A Bama Performance Calibrator writes custom tunes just for your Mustang & Mods
  3. Load 'em on your Mustang and GO!
  4. As you add new mods, Bama will update your tune files for FREE!
That's right, Free Tunes for Life!

More Power. Do you want the ultimate power package for your Mustang? Well look no further, because it has arrived. AmericanMuscle introduces the kit that will launch you into quarter mile times that you have never dreamed of possible; designed to give the best possible performance upgrade for your car, without having to empty your wallet.

Kit includes: (click on each item for full product description)

Increased HP and torque. From the factory, the manufacturer programs their vehicles to cater to the needs of the daily driver, not the performance enthusiast. After loading the custom Bama Tune on a vehicle, even a bone stock, unmodified Mustang will realize noticeable gains in HP, Torque, and Fuel Economy.

Increase your mod's potential. Factory computer settings are calibrated for the original factory components. When making performance modifications, you need to recalibrate the vehicle's computer to realize the full potential that these modifications can achieve.

Free tunes for life! Every customer that purchases a tuner is enrolled in the "Free tunes for life" program. Any time that you make additional mods to your vehicle, our team of SCT certified Bama Custom Tuners will create new tunes for you.

Custom Bama Tunes specific to your vehicle. When you order a tuner, you aren't just getting a tuner - you are getting the tuner and 3 dyno-tested custom Bama tunes:

  • Street (87-93 octane) - the street tune is designed as a daily driver program that focuses in on increasing mid-range power. It does give up a few HP at higher RPMs, but that's why there is a Performance file. Automatic vehicles are further enhanced by making adjustments to the transmission's shift points and firmness.
  • Performance (87-93 octane) - The Performance program is designed to add power at 3000 RPMs and higher, focusing more on the top end horsepower and all out performance driving. Timing, fuel and throttle response settings are slightly more aggressive than the street tune. This is a great track tune but also works well for daily drivers that are looking for a little more "get up and go" than the street tune. The automatic transmission settings are the same as in the street tune.
  • Race (91 - 93 octane) - The race tune will ensure the largest increase in vehicle performance. Using the highest grade of fuel available in your area is mandatory. This file is designed for "Race only Use" as the timing, fuel, and throttle response settings are very aggressive. in fact, the adjustments are so aggressive, that we do not recommend it for daily driving as it may cause your vehicle to try to jump out from a stop and easily spin the tires. Finally, with the automatics, we implement entirely new shift points and firmness settings to further enhance the all-out performance of the vehicle.

Nitrous (91-unleaded race gas) - Our nitrous option can be added to any of our previously mentioned tune options, but only for 91-octane unleaded fuel.

Easy to load; easy to restore. Not only are the custom tunes easy to load on your vehicle, it is just as easy to restore your factory settings. When you load your custom tune on the vehicle, the tuner automatically stores your vehicle's factory settings. To return the vehicle to its factory settings, just plug the tuner back in, select the option to restore the factory settings, and you're done.

SCT SF4/X4 Power Flash Tuner Features:

  • The SF4/X4 by SCT is the newest replacement for the popular SF3/X3
  • Reads / Clears DTC Trouble Codes
  • On screen data logging and monitoring
  • Full color LCD display with auto dim feature
  • Built-in WiFi for easy updates
  • PC/Windows compatible
  • Custom tuning applications for 1999-2004 GT, Bullitt, Mach 1 and SVT Cobra Mustangs
  • Click for Instructions on Loading Custom Tunes to your Mustang.

Approximate RPM for 1999-2004 GT


Manual
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 4274 5983        
2 2529 3540 4552 5563 6575  
3 1669 2337 3004 3672 4339 5007
4 1264 1770 2276 2782 3287 3793
5 860 1204 1548 1891 2235 2579


Automatic
Gear @25 MPH @35 MPH @45 MPH @55 MPH @65 MPH @75 MPH
1 3591 5027 6463      
2 1960 2744 3528 4311 5095 5879
3 1264 1770 2276 2782 3287 3793
4 885 1239 1593 1947 2301 2655
Will it fit my Mustang?
  • Bullitt - 01
  • Mach 1 - 03, 04
  • Cobra - 99, 01, 03, 04
  • GT - 99, 00, 01, 02, 03, 04

Fits Mustangs equipped with a 8.8" rear end only

Most Helpful Reviews

5/5
Awesome Buy

I didn't really want to do any performance modifications to my Bullitt but wanted to wake her up a bit, this tuner did just that! Huge difference!!

Helpful (1)

5/5
I love it!!!!

I started with street level and it was great! Then I switched to performance and I was really impressed!!! Then I switched to race level and I was blown away!!!! I love this product!!! It's made my car ...

Read More
Helpful (1)

Overall Rating 4.6 out of 5 stars
Read All 100+ Reviews

Customer Photos

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22 Questions / 13 Answers

Ask a Question

Whats the difference? What is the difference between this kit and the kit for 35 dollars?

ncstang06

  • This kit comes complete with everything you need for a full rebuild: bearings, shims, crush sleeve, etc... The $35 kit is a basic kit that is the same as the more expensive version, but there are no bearings included. We highly recommend getting the complete kit and replacing all your bearings and shims at the same time to prevent any costly problems down the road. It's better to replace them all at once, rather than having to tear the car apart again just for a bearing gone bad.

    LisaS

    Good Answer (5) (0)

Show 2 more answers Question Resolved

4.10 gears installation kit I recently purchased the 4.10 gears for my 2006 mustang GT and I'm not sure which installation kit I should buy !! Is this the right one !?!

andres

  • Certainly is the correct kit! It will come with everything you need for a complete swap during your 4.10 gear install! Includes all the bearings, shims and seals necessary!

    LisaS

    Good Answer (3) (0)

Show 3 more answers Question Resolved

4.10 Gears/Shift Points on an Auto i had 4.10 gears put in, i want to know does the tune itself fix the spedometer? and also does my custom tune's change the shift points change for the gears ? or do i have to go about changing the shift points on my own

BlackPony2001

  • Within the tune, we will correct the shift points when notified of a gear change such as 4.10's and the speedometer will be fixed as well.

    LisaS

    Good Answer (2) (0)

Show 2 more answers Question Resolved

Would this tuner work with a 32 valve mach 1?

BobbyUthoff

  • Yes, this tuner will work with the Mach 1 and we are able to provide custom tunes for the Mach 1 as well.

    MatthewA

    Good Answer (2) (0)

Question Resolved

Can i data log AFR and Boost on my X4?

Bstang2

  • Yes. The tuner can accept analog inputs such as AFR and Boost signals for data logging.

    MatthewA

    Good Answer (0) (1)

Question Resolved

can the Bama SF4/X4 be used to turn off theft system I have a 2003 mustang GT, I've had several occasions when car would not start due to theft system. I would like to bypass/turn off the theft system

kkeymanz

  • We can disable this system within a custom tune upon your request.

    MatthewA

    Good Answer (1) (0)

Question Resolved

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Customer Reviews (100+) Write a Review

Overall Rating 4.8

out of 5 stars

  • Performance Gain 4.603331 4.6
  • Seat Of Your Pants Feel 4.526232 4.5
  • Ease Of Use 4.821558 4.8
  • Bang For Your Buck 4.472628 4.5
  • Preferred Tune: Performance



  • 5/5

    November 23, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Must have Bolt-On Companion

    I have this Tuner with Three Tunes installed for all my current bolt-ons and it made a world of difference in my performance and really allowed me to gain the full potential of my bolt-ons. I recommend it for easy Bolt-on builds. I daily my GT and it just feels more alive and it is a very easy process to install the software, and use the Flash Tuner. The tune installation is smooth and quick. Just remember to read all the directions or call the customer support if you are unsure. They guided me in every single step.

    GTLove03

    Year: 2003 Submodel: GT

    Helpful (1) (0)

  • 5/5

    November 08, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Get it now

    I was sceptical that a ECU flash could make any noticeable difference. I was wrong. My 03 GT has a cold air intake and Flowmaster exhaust, other that that stock as far as performance. The custom tunes provided by Bama really woke up the sleeping beast. I just wish I had a dyno to see what I really gained, but it is noticeable. This is probably one of the easiest upgrades you can do to pick up what Ford left on the table.

    03gt

    Year: 2003 Submodel: GT

    Helpful (1) (0)

  • 4/5

    October 27, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Bama tuner

    This product works just as it is described. Very easy to use, so far I love it! Just a simple plug and play.

    SlammedStang

    Year: 2004 Submodel: GT

    Helpful (1) (0)

  • 4/5

    October 25, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Worth the money

    Having a automatic this tuner was well worth it just for the shift firmness. Fells like a shift kit. I can also tell a power gian and have gotta a little better gas mileage. Free tunes for life tops it off as a complete package worth $400

    Tater

    Year: 2003 Submodel: GT

    Helpful (1) (0)

  • 5/5

    October 24, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    The Bama tune does what it says it do

    I am happy with the product and when I hooked it up to the Mustang I get the most power out of my mods and I would recommend it to all the Mustang girls and guys

    staley

    Year: 2003 Submodel: GT

    Helpful (1) (0)

  • 5/5

    October 11, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    A must have!

    Great product! A must have! Price is a little high but well worth the gain. If you are thinking about it, Get It!

    01BullittAZ

    Year: 2001 Submodel: Bullitt

    Helpful (1) (0)

  • 5/5

    September 16, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Not good but great!

    Really woke up the car with the performance tune , wasn't expecting much since my car doesn't have much upgrades but it proved me wrong

    Pat805

    Year: 2001 Submodel: Bullitt

    Helpful (1) (0)

  • 4/5

    August 22, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    OUTSTANDING.

    THE BAMA TUNER WORKED EXCELLENT I HAVE A 2001 MUSTANG GT AUTO WITH 4.10 GEARS AND WIDER TIRES A COUPLE BOLT ONS. FORD COULD NOT ADJUST THE GEAR RATIO CHANGE SO TUNING IT WAS MY ONLY OPTION. IT REALLY WOKE UP MY CAR IT SHIFTS HARD AND REVS HIGHER ASWELL MY SECOND GEAR UNDER NORMAL ACCELERATION WILL REV UP TO 4K RPM. IT SOUNDS WONDERFUL THE ONLY REASON I WONT GIVE IT 5 STARS IS BECAUSE I HAD A BIT OF TROUBLE SETTING UP THE PIDS FOR THE DEVICE, THAT SHOULD BE SOMETHING THAT IS PRE-INSTALLED IN THE TUNER BEFORE RECIEVING IT. OTHER THAN THAT IT WORKED GREAT..

    sergiio92

    Year: 2001 Submodel: GT

    Helpful (1) (0)

  • 5/5

    August 18, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Excellent

    This tuner did exactly what it was supposed to do, tune my car. I bought a 2001 GT and the previous owner had started beefing it up a little (4:10 gears, TB,Intake,etc) but I wasn't sure what all had been done but I know it didn't run great. Ordered this tuner. the AmericanMuscle and Bama techs walked me through on how to give them the best info possible. I received the tuner with 2 custom tunes (87per-93rac) and I loaded the 87 octane performance tune on my car quickly and without any problems. It worked perfectly! Now I had to drive all over as to run out my gas so I could fill the tank with 93 octane and load my racing tune. Only problem at all is my speedo is still off about 7mph but all that requires is contacting Bama and they will email a new tune with the correct speedo settings. I highly recommend this tuner

    Mustainer

    Year: 2001 Submodel: GT

    Helpful (1) (0)

  • 5/5

    August 03, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    04 Mustang GT auto

    This 04 mustang was bone stock. The two simple modifications of adding the Bama X4 tuner and changing the gearing to 4/10 made it a much more aggressive and fun to drive car.

    Jong

    Year: 2004 Submodel: GT

    Helpful (1) (0)

  • 5/5

    May 19, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Bama X4/SF4 - Well worth the cost!

    Simply put, I think the 99-04 GT's are underrated to begin with, but after flashing my factory ECU with the 91 octane performance tune my little pony showed what a true race horse she was meant to be. A very noticeable gain in power, I can only imagine what the 91 race tune is capable of..! The only other mods I had already in use was a CAI and flowmaster 40's and short throw shifter. American Muscle.. thanks!!

    HookedonAmericanMuscleCarPerformance

    Year: 2002 Submodel: GT

    Helpful (1) (0)

  • 5/5

    March 31, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Great tuner

    I bought this to replace the old diablosport predator that came with my car when I bought it. Over the Predator I noticed it picked up a bit quicker, not a huge difference but a difference none the less. With this being newer with the times of technology as well, I will be able to grow in to it with each mod and tunes are free! Can't beat the customer service either these guys really are awesome! Love the tuner and the adjustability as well.

    NightfuryBullitt

    Year: 2001 Submodel: Bullitt

    Helpful (1) (0)

  • 4/5

    March 09, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Woke my 2V right up!

    Easy order and shipping. Plugged it in and off I went. 93 performance tune works great and the car runs awesome! Would buy again in a heartbeat

    juniorv130

    Year: 2004 Submodel: GT

    Helpful (1) (0)

  • 5/5

    February 07, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (03-04 Cobra)

    Needed this

    My cobra came with a chip installed by previous owner. Not sure what tune details were on the vehicle. Installed the bama tune night and day/difference!!!

    s281joel

    Year: 2003 Submodel: Cobra watsonville, CA

    Helpful (1) (0)

  • 5/5

    January 11, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Wow

    This tuner really changes your car it drives 100x better. It's feels like a new car. The tunes come quickly and it is easy for anyone to use. It looks quite nice as well. I would recommend this to anyone.

    Milam04

    Year: 2001 Submodel: Bullitt Vancouver Wa

    Helpful (1) (0)

  • 5/5

    January 05, 2016

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (03-04 Cobra)

    Must have product!!!!

    Great product, very easy to use, worth every dollar! Lifetime updates make this a must if you plan on doing any modifications. Customer service was great as usual. Ryan McDonald and Van Bond were extremely helpful!

    Zack

    Year: 2003 Submodel: Cobra Pittsburgh, Pa

    Helpful (1) (0)

  • 4/5

    December 11, 2015

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    W O W . . . .

    I have a 2001 GT automatic. It's got 3.73s and Flowmasters...otherwise STOCK. I bought a SCT X4 tuner with canned tunes to adjust my speedometer. Those tunes jacked up my shift points and firmness. I called SCT and talked to them a few times. They looked over my files and sent me new ones. Same problem. TERRIBLE drivability. Car held 1st too long, then wouldn't even stay in 2nd. Sent it back for a refund and bought a tuner from Bama. Told them I wanted the transmission to shift like stock, maybe a touch firmer, but stock shift points and driveability. W O W. They hit a home run on the first try. I loaded the Performance tune first... it shifts like a dream!!! Firm, but not harsh. And it uses ALL the gears in the transmission. In daily driving, at half throttle you can feel it wind through 1st, then 2nd, then 3rd... the way it's SUPPOSED to be!! I love it!! There definitely is improved throttle response and a small bump in power in the mid-range and above too. I want to try the Street tune next... they say it has more low end power. I'm impressed!!! 3 stars for "bang for your buck" because $400 is insane.. but 4-5 stars everywhere else!

    OldYeller

    Year: 2001 Submodel: GT Lawrenceburg, KY

    Helpful (1) (0)

  • 5/5

    December 09, 2015

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Love it.

    I would not hesitate to buy this. This is the second time I bought it, having had two different Mustangs, and I love it.

    Kriegmacher

    Year: 2001 Submodel: Bullitt Georgia

    Helpful (1) (0)

  • 5/5

    June 01, 2015

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    Bama SF4 Tuner

    I was one of the many skeptics who weren't sure if this product was worth it or not. Now I can say I definitely should have bought this long ago. I've only used the 87 octane street tune and the performance is much better than before. Tire chirping shifts at WOT, I love it. I have an automatic, so the shift points and pressure were adjusted and it shifts nice and quickly. Under the hood I have a CAI, bigger TB and a bigger plenum, and now the ECU knows what to do with the extra air. I can't wait to test out the 93 octane race tune. Mpg aren't any better because I can't keep my foot off of the pedal, but smiles per gallon increased ten fold. I definitely recommend this product.

    Ethan03

    Year: 2003 Submodel: GT Great Falls, MT

    Helpful (1) (0)

  • 5/5

    May 14, 2015

    Review from Bama X4/SF4 Power Flash Tuner w/ 2 Custom Tunes (99-04 GT, Bullitt)

    awesome

    Awesome product, you will feel difference first three gears for sure.

    cesar

    Year: 2002 Submodel: GT

    Helpful (1) (0)

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