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BBK Twin 65mm Throttle Body (96-01 Cobra, Bullitt; 03-04 Mach 1)

Item 56052
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      Review & Installation Video

      Hey, what's up everybody? I'm Justin with, and this is my detailed overview of the BBK Twin 65 millimeter throttle body option available for all '96 to '01 Cobras and the '03 to '04 Mach I. In this video, I'm gonna talk to you about what you can expect when upgrading your throttle body like this, what you're gonna be looking at as far as materials and construction with the BBK option, and then finally what it takes to get this thing bolted up to your four valve. We're gonna do a quick walk through of the install later on in this video, but expect a very simple one out of three wrenches on the difficulty meter. A few basic hand tools is really all you're looking at here. You should be checking out the BBK Twin 65 millimeter option for your Cobra or Mach I if you've already taken care of some moderate modifications or maybe have gone forced induction and you're looking to upgrade that factory 57 millimeter twin option to the larger 65 millimeter throttle body. It's gonna get you a little bit more power. It's gonna get you a little bit more throttle response in the process. You don't need to get a tune to get this thing up and running. It's a direct bolt-on modification. But, ultimately, running a tune with this throttle body will get you some bigger gains, especially with those more moderately modified setups or maybe those blown setups. When shopping for your aftermarket throttle body options for your naturally aspirated or blown four valve car here on the site, you're gonna find a few different options. BBK offers a 65 millimeter option that we have here. They also offer a twin 62 millimeter option. You're also gonna see a couple from Accufab as well - similar price, similar sizing. How do you determine what is the best option for you? I will say that the twin 65 millimeter option that we have here in this video, again, is going to be better suited for you Mach I or Cobra owners out there that have done a decent amount of modifications or maybe even added a blower or a snail. I wouldn't necessarily recommend this for a first mod out there or if you plan on keeping things relatively simple. For that, I would recommend BBK's twin 62 millimeter option if you do plan on keeping things a little bit more simple overall. All right, guys, using the information we just talked about, maybe you've done some research on your own. You've landed on the twin 65 millimeter option. What kind of performance now can you expect when using this thing? Well, BBK claims 12 horsepower at the wheels when using their throttle body, their twin 65 millimeter option, and I have no reason to disagree with that. But again, the more heavily modified setups will see the bigger gains overall, including the cars that have used an aftermarket custom tune. Those cars that keep things relatively simple, the mild bolt-ons, you might not see as big of gains when making the switch to this throttle body, because, again, this is one of those parts that really does work well when used with other mods. One thing you can count on, though, besides the power gains is the improved throttle response overall. That is something nearly every single one of our customers have pointed out in the customer review section. I really encourage you to check that out because, again, it's a great way to get some honest feedback from real four valve owners who have this thing installed and pound the pavement with their car every day. Again, they're just gonna give you some honest feedback. All right, guys, I will say, as far as construction is concerned, BBK has done a very solid job. They've actually used 356 grade lightweight aluminum alloy for the build of all of their throttle bodies, all CNC. I've seen these things actually made in person. It is very impressive. It's pretty crazy to see this thing basically start off life as a big hunk of aluminum. At that point, the CNC machines go to work, and what you're left with here is their twin 65 millimeter option. Basic construction aside, you're also gonna find that BBK loads their throttle bodies with brand new double sealed bearings, new throttle linkages, new throttle shafts as well, so basically expect this thing to perform like a factory part. It shouldn't give you any headaches down the road, and it's gonna fit great. All BBK throttle bodies do include brand new hardware, brand new gaskets, and all of them are 50 state legal. As you guys can tell, I'm a fan of the BBK throttle body from overall construction and fitment and all that good stuff. However, I do have one small little nitpick or bone to pick with BBK. I would've preferred to see them kind of smooth out or round out some of these sharp edges here with the opening, just to help promote a smoother air flow overall, kind of like what Accufab does with their four valve throttle body options. But, that's pretty much where my complaints end with this option.Switching gears, let's quickly talk about price with the BBK twin 65 millimeter option. This thing is gonna be priced much in line with the rest of your aftermarket throttle bodies for the naturally aspirated four valve cars. You're gonna be looking at right in the mid to high $300 price point, which is pretty fair, given a mod like this. As far as the install is concerned, guys, like I talked about earlier, this one's gonna be a strong one out of three wrenches on my overall scale of difficulty, maybe an hour or two to get everything bolted up. Pretty straightforward. Anybody should be able to knock this one out with some pretty basic hand tools in the shop or garage with ease. You're looking at some sockets here, a few screwdrivers, and an Allen key set is really all you need to tackle this job. As far as your basic install steps, well, you need to remove your intake first to gain access to your factory throttle body. Remove the four bolts holding that thing in place. Discard that factory gasket as it will no longer be used. At this point, transfer over your TPS sensor from your factory throttle body over to the new BBK throttle body. Reinstall in reverse order using the new hardware and the new gasket, and you should be all set. As for my final thoughts on the twin 65 millimeter option here from BBK, well, guys, I think this is an awesome choice for any heavily modded four valve out there, whether it be naturally aspirated or forced induction. If you're sticking with a more mild naturally aspirated build, I'd recommend going with the twin 62 millimeter option instead from BBK. Overall, if you are interested in the big boy here, be sure to check it out at

      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Gain Up to 12 HP
      • Improves Throttle Response
      • Bolt-On Installation
      • Lightweight Aluminum Construction
      • Includes Hardware
      • CARB EO Number: D-245-17
      • Fits 1996-2001 Cobra, Bullitt and 2003-2004 Mach 1 Mustangs


      Gain Up to 12HP. Replace your Mustang's restrictive factory throttle body to gain up to 12 horsepower and improve throttle response for power you can really feel. This free-flowing BBK twin 65mm throttle body will improve airflow where it matters most, maximizing horsepower from all your mods and really waking your Pony up off the line.

      65mm Twin Blade Design. Your stock throttle body chokes off airflow and keeps your Mustang from breathing freely and giving you all its got. This BBK throttle body features a generous, free flowing 65mm twin bore design.

      CNC Machined Aluminum. BBK's throttle bodies are cast from high quality, lightweight 356 aluminum alloy that is finished using CNC machining to ensure a precision fit. They feature double-sealed bearings, o-ringed throttle shafts, and precision die-stamped linkages to ensure a long life and maximum performance for your Pony.

      Bolt-On Installation. The BBK Throttle Body is designed for a straightforward installation and includes all necessary hardware. It is designed to be installed reusing the factory throttle body gasket making it a no-hassle mod.

      Application. This BBK Throttle Body is designed to fit the 1996-2001 SVT Cobra, 2001 Bullitt, and 2003-2004 Mach 1.

      Fitment: 1996 1997 1998 1999 2001 2003 2004 Details

      MPN# 1711

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (39)

      Write a Review

      Ratings Summary

      4.3 out of 5 overall rating from 39 customers

      Installation Time: Less than 1 Hour

      • July 30, 2019

        2 2001 Cobra - Dave Installation Time: Less than 1 Hour

        Not worth the trouble

        I've had issues with BBK throttle bodies sticking in the past and nothing has changed. I got little to no help from American Muscle as usual. I'm an ASE certified tech and have been for 25 years. I was told to take the car to a shop and have them "write a report" about the issues I was having. This is a known issue with aftermarket throttle bodies. American Muscles customer service and issue resolution has declined dramatically over the past few years and I only shop with them when I don't have another option.

        Helpful (3)
      • February 12, 2019

        5 2003 Mach 1 - DouglasC Installation Time: Less than 1 Hour

        Looks really nice on the car

        Pretty easy install just remember to adjust the idle screw or you'll waste an hour trying to figure out why it wont stay runing lol

        Helpful (5)
      • January 01, 2019

        5 2003 Mach 1 - JohnnyE Installation Time: Afternoon

        BBK Twin 65mm Throttle Body

        Well constructed. You will need to make a few changes on a Mach install. The base is a little bit thicker than stock TB. When the stock shaker rear brace is reinstalled, you will need to install a spacer between the TB and bracket to keep the bracket from bowing up in the back. I used a 6mm nut with the threads drilled out so the bracket would work. I also used the stock bolts so that the flange nut would hold the bracket securely.

        Helpful (3)
      • December 04, 2018

        4 2001 Bullitt - Konnor Installation Time: Less than 1 Hour

        2001 bullitt

        Great part. Only problem is it didn’t fit perfectly unless you pushed it up as much as you could before completely tightening the bolts and I had to bend my throttle cable bracket or else it will keep my throttle stuck over 1,000 rpms. And yes this was after adjusting the throttle screw. Besides that very easy install and defiantly notice the difference.

        Helpful (6)
      • October 15, 2018

        5 1999 Cobra - JordyS Installation Time: Less than 1 Hour

        Great Throttle Body!

        Despite what everyone else says, this is actually a great throttle body. I noticed a good bump in throttle response immediately after installing. There are a few important notes about this throttle body that only one other person mentioned. ABSOLUTELY the throttle body adjustment screw will need adjusting. You WILL experience a sticking throttle (both in initial use, like it takes a lot of pressure to get the throttle to "crack" open, and while depressing the throttle all the way) if you do not adjust the throttle body when first installing. At least for mine, the idle stop screw was loose and easily adjustable right out of the box. I didn't realize that this screw will back itself back down to the "out of the box" adjustment point (after attempting to adjust it to where it needs to be) which causes a sticky throttle. When adjusting the idle stop screw, get the screw adjusted so it touches the throttle bracket and then do another 1/4 to 1/3 turn. THEN! Get some lock tight and get a few drops on the idle stop screw and let it set for a few hours. You will still have some adjustability on the idle stop screw, but it will have enough resistance so it will stay where you adjust it. I do recommend getting a tune after installation. I have a '99 Cobra with a CAI, BBK Off road X pipe, and some Super 10's welded in.

        Helpful (5)
      • July 30, 2018

        1 2001 Cobra - SVT Installation Time: Less than 1 Hour

        2001 cobra

        Easy install. However, I can't seem to get the car to idle properly. 1st my pedal was really sticky and once I fixed that now my idle is all over the place... The car wants to idle at around 2000 rpm until i let out the clutch a little and let move forward, then it dies down to around 1200rpms. I have a bama tune installed for the throttle body and it still doesn't help. The other day i was driving and went to stop at a light and my rpms jumped to 3000. I am about to take it off and re-install the stock tb. All it seems to be is problems. I like the acceleration response I am getting, but the idle problems might not be worth it.

        Helpful (15)
      • April 28, 2018

        3 2001 Cobra - philthy Installation Time: Less than 1 Hour


        This is not worth the $. The computer is having trouble with the idle. Idle is slow to drop. RPMs hovers around 1200 to 1500 till you come to a complete stop. RPMs jump up when shifting. Can't find a definite fix online anywhere. The throttle response is better and it might be worth it if i can get the idle to settle down. They say it takes time for the computer to adjust so I will see. I guess I have to much $ to burn. Also I thought it would help with my bbk long tube headers I will be installing. Good luck if you desire to get tis product.

        Helpful (9)
      • April 01, 2018

        4 2003 Mach 1 - Starwars210

        65 tb

        i bought this TB mine whistles everytime i step on gas after 1500 rpm is this ok ??

        Helpful (19)
      • March 30, 2018

        4 1999 Cobra - Cheddar Installation Time: Less than 1 Hour

        BBK twin 65mm throttle body

        No instructions but you shouldn't really need any especially if you pay attention to how you took the old one off. Construction seems really nice and it felt like it helped throttle response. It bolted right up everything lined up and fit but it seemed like there was a bit of a lip where it attaches to the intake manifold otherwise I would have given it a 5/5

        Helpful (6)
      • February 08, 2018

        5 2004 Mach 1 - KrisC Installation Time: Less than 1 Hour

        Great Fit

        Product is a great fit and looks great ! Car feels stronger and more responsive ! Can't go wrong !

        Helpful (7)

      Questions & Answers (8 answers)

      5 Top Rated Questions

      i here on some of the forums that the BBK 65mm throttle body has problems, like cruise control not working, throttle body sticking and not idling right. do you have a fix for all this, i just bought one and dont want to have any issues after the install. i plan on adding a cold air intake, tune and full exhaust. do you recommend anything else to get the most hp with out breaking into the motor

      • These issues are extremely uncommon to have and should not be experienced. Without breaking into the engine there isint much more to be done to gain more horsepower, the next step could be intake spacers to gain more horsepower.

      Helpful (7)

      Twin 65mm TB For 2003 Mach Won Is this a ok upgrade for a mach 1 thats pretty much stock? or is this product more designed for a car with more done to it to get any real gain? I just have a JLT Ram air on my Mach and magnaflow catback and x pipe. and another question, what size TB does my 2003 Mach Won come with stock?? thanks!

      • Stock is dual 57mm. If you didn't have the intake and catback, I'd recommend the BBK twin 62mm version of this product. Since you do, this one will work well to get the most from your Mach 1. To really take advantage of the larger bore on this version, get a larger MAF (Ford Perf. 90mm), headers, and a custom tune.

      Helpful (4) Show 1 more answer

      So it says on this website it is not carb legal, but on BBKs website, the same part(#1711) says it is carb legal. Which is it?

      • According to BBK, this is CARB legal under EO #D-245-17. Our site is being updated to reflect this.

      Helpful (1)

      I have the 63mm and when looking at intake manifold the holes are 57mm so how do you get gains when the extra opening is hitting the old 57mm wall? My thinking was getting machine shop to help with this problem but there us no mention off this being an issue and looks like people just install without noticing this. Any help would be appreciated.

      • The BBK Twin 65mm Throttle Body is designed to fit several models, and as such, will fit slightly different depending on the model. Some early Cobra's, ad Mach 1's will have twin openings in the intake, which work best when opened up with an aftermarket throttle body, though gains can still be had without doing this. Some models will have a significantly larger opening, and don't require any work to meet their full potential.

      Helpful (1)

      I have a mmr 1000 stroker kit and stage 3 cams with Bassani headers and exhaust . Would a 62 or 65 mm better?

      • We would recommend the BBK Twin 65mm Throttle Body over a 62mm Throttle body as your stroker will have greater airflow requirements.

      Helpful (0)
      Post Your Question
      3 More Questions
      I have a 2001 Bullitt with bbk headers connected to a pro-chamber free flowing exhaust. For the intake, I have a jlt cai, and I also have a diablo sport tune. My question is, which size ? 62 or 65mm? 1 answer
      If installed will it pass VA emissions inspection? 1 answer
      My auto Mach 1 is putting down 437rwhp and about 400rwtq through a Vortech H/O kit with full exhaust and CA intake. I'm wondering if upgrading from the stock 57mm TB to the 65mm TB will make much of a difference or if I should go bigger? Should I be concerned about idle, keeping cruise control and having to do any retuning? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Throttle Body
      • (1) Gasket
      • (6) Screws
      • (1) Set Screw
      • (1) Bushing

      Tech Specs

      • Fits 1996-2001 SVT Cobra, 2001 Bullitt, and 2003-2004 Mach 1
      • 65mm Twin Blade
      • CNC machined from high quality 356 aluminum castings
      Throttle Body Specifications
      Bore Size: Twin 65mm Single or Twin Blade: Twin
      Year: 1996-2004 Model: 96-01 Cobra, 01 Bullitt,
      and 03-04 Mach 1
      Material: Aluminum Finish: Cast Aluminum
      Manufacture: BBK Computer Tune Required: No

      Will It Fit My Mustang

      • Bullitt - 01
      • Cobra - 96, 97, 98, 99, 01
      • Mach 1 - 03, 04

      Fits 1996-2001 SVT Cobra, 2001 Bullitt, and 2003-2004 Mach 1

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