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Ford Performance E303 Performance Camshaft (85-95 5.0L)

19 Reviews
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  • Item #24069
  • MPN# M-6250-E303

  • Market Price $239.99
  • You Save 17% ($40.00)
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Product Videos
  • Improved Street Performance
  • Great for Naturally Aspirated Mustangs
  • Hydraulic Roller Lifter
  • CARB EO Number: D-225-16
  • Sold Individually
  • For 1985-1995 5.0L with 1.60 Rockers
Street Performance. This Ford Racing cam is a great replacement choice for excellent Low and Mid Range Torque, and a Good Idle. The Ford Racing E303 Performance Camshaft is also a great choice for naturally aspirated 5.0 Mustangs.

Installation Note: This Ford Racing E303 Performance Camshaft requires upgraded valve springs for proper operation. Valve spring requirements: 120 lbs valve seat pressure minimum 295 lbs open. For stock cylinder head applications, the use of Ford Racing M-6513-A50 valve springs installed at 1.820" are recommended. For use with aftermarket cylinder heads, Ford Racing M-6513-BH valve springs are recommended.

Application. The Ford Racing E303 Performance Camshaft is designed for use in the 1985-1995 5.0L V8 Mustangs with 1.60 rockers.

Technical Notes. Ford Racing recommends the use of a Hi-Stall torque converter for Mustangs equipped with automatic transmissions.

Fitment: 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 Details

What's in the Box
  • (1) Camshaft
Installation Info
Tech Specs
Ford Racing Data Sheet
Part Number: M-6250-E303 Rocker Ratio: 1.60
Lifter Type: Hydraulic Roller Lifter Engine Type: FORD 5.0 (1985-1995)
Lobe-Center Int. 110° Lobe-Center Exh. 110°

Intake Exhaust
Valve Lash: Hyd. Hyd.
Duration: 282° 282°
Duration @ .050" Lift: 220° 220°
Valve Lift: 0.498 0.498
Lobe Lift: 0.311 0.311

Valve Timing @ 0.05" Lift: Open Close
Intake: 0° BTC 40° ABC
Exhaust: 40° BBC 0° BTC
Will it fit my Mustang?
  • Cobra - 94, 95
  • Foxbody - 85, 86, 87, 88, 89, 90, 91, 92, 93
  • GT - 94, 95

Fits 1985-1995 5.0L V8 Mustangs with 1.60 rockers

Most Helpful Reviews

E 303

Got the camshaft have not installed it yet but I'm pretty sure it will sound good from the reviews I've read thank you American Muscle.

Helpful (1)

Awesome upgrade

This cam was just what the doctor ordered . Great sound great performance

Helpful (1)

Overall Rating 4.8 out of 5 stars
Read All 19 Reviews

Review & Install Video

Hello and welcome back to Stage 3 of AmericanMuscle’s project Foxbody, as you can see we’re currently out enjoying the fruits of our labor which took place in the first two stages, and for the first time since we started this project, I can honestly say I’m not embarrassed to be out driving it. Of course a part of that lack of embarrassment is because we haven’t pulled up to anything fast yet, there’s no doubt our GT is looking good, but what’s the point of having all those Cobra parts if we don’t have the performance to back it all up, well, welcome to stage 3 my friends, where all of that is about to change. Before we get back to the shop where we lay out our plans to increase our tire slaying abilities, let’s recap what we knocked out in stage 2. In stage 2 we completely replaced our destroyed factory convertible top, with a brand new top and rear glass, along with just about every piece of molding and weather stripping you can think of, we put the finishing touches on our convertible Cobra vision, thanks to our Cobra tail light covers and 10th anniversary Cobra style wheels, made possible through the 5 lug conversion kit we installed. Finally, we moved to the interior and made it look as good as our exterior, thanks to the freshly painted dash, new carpet, and other miscellaneous items making our GT look and feel like it was 1993 all over again. Alright, I can’t wait to get back to the shop to show you all the stuff we have in store for this stage, let’s get to it. As you can see we have some big plans for our 302, all with the goal of replicating the Cobra’s power plant, which is going to drastically improve our performance. For starters, we’re going big with a trio of parts from Ford Racing, all of which will do wonders for our 5.0. First up we’re looking at the Turbo Swirl GT40X aluminum heads from Ford Racing, these heads are a variation on the original GT40 heads found on the 93 Cobra, with a few improvements. For one they’re made out of lightweight aluminum versus the heavier cast iron and they’re designed to flow much better than the original GT40’s. To top it off, we’ve installed some Cobra valve covers. For us to see the biggest gains using these heads, our stock cam just isn’t going to cut it, so we’re going to go with a popular street cam, the Ford Racing E303. This hydraulic roller cam should really compliment those GT40’s, and is an excellent choice for any street car thanks to its low to mid range torque. Of course we’re still going to have that great lope at idle which should sound amazing by the way, but it’s not radical enough that we’re going to have to worry about stalling out at every red light. The cheery on top for our 302 has to be this Ford Racing intake manifold, which is getting nearly impossible to find anymore, this part, paired with our Ford Racing heads and cam, is going to allow our 5.0 to flow some serious air, and will complete our Cobra transformation under the hood. Alright, in order to move all that extra air out of the engine, we’re reworking out entire exhaust from the headers all the way back, in order to keep up with that Ford Racing theme we’ve got going on under the hood, we selected our ceramic shorty headers, which we’d already installed when we did all of our motor work, and are designed to work specifically with those GT40 heads. From there, we go to BBK’s off road H pipe which does feature mandrel bent 2.5” stainless steel tubing, and should bolt up to those shorty headers without issue. Finally, everything’s going to exit out of Flowmaster’s American Thunder Cat-Back exhaust, which features those iconic 44 series mufflers. This exhaust features 100% stainless steel constructions throughout, including 2.5” mandrel bent tubing, and those OE style polished tips. Alright I think it’s safe to say we’ve got the performance side of things pretty well taken care of, but we haven’t addressed the fact that this thing still handles like a boat. So we’re going to attack our suspension much like we did our engine, go big or go home. Ron and I are just finishing up installing the KONI STR shocks and struts, which are actually a killer set for the price. We’re pairing those up with the SR Performance lowering springs, which should lower our Fox about an inch and a half on all 4 corners. Finally, we have the car in the air, the wheels off, we figured this would be a great time to ditch those rusty old drum brakes, in favor of these brand new disks. To dial in our new Fox’s alignment, we’ve installed the SR Performance caster/camber plates, which should get everything back into spec without issue, and offer a little bit more adjustment in future if need be. Since our car is a convertible, we are losing some of the structural rigidity which comes along with having a steel roof, to help combat this, we’ve installed the SR Performance subframe connectors, this part along with our springs, shocks and struts, should take all the laziness out of our suspension, and get it handling like a sports car should. Alright, now everything’s pretty much buttoned up, we’re going to tie it together with one of our custom Bama tunes, and see if all this hard work has paid off in really cranking up the power. We’ve already grabbed our baseline run after stage 1 when we got the car back from painting, so I’m going to hop in, bury this thing one more time, and see what the improvements are. Alright, our baseline run with our 93 GT gave us 194 horsepower, and 266 ft/lbs of torque. With all of our stage 3 modifications, the car put down an impressive 279 horsepower, and 317 ft/lbs of torque, making for a solid gain of 85 horsepower over our baseline numbers. The car did even better throughout the power band, picking up as much as 103 horsepower, and 107 ft/lbs of torque, throughout the curve. With the power finally there to back up our Cobra appearance, I think it’s time for one more cruise to see how our Fox does with all its modifications. Alright, stage 3, performance, check. The car's breathing better, the tune brought it all together, and as a result, this thing has some serious balls. Here we are, we’re in the back roads, moving along at a good clip, I’d saying the car is doing quite well, it’s pretty confident, I feel confident driving it, I don’t feel like I’m going to fly off the road, which I couldn’t have said before we did all this work. The car feels good, sounds awesome, and it’s just a whole hell of a lot more fun to drive. I know some people might question this build, you know, why a convertible, why a Fox body, well, because we wanted to, I mean that’s what car building is all about, it’s doing what you want. In this case, we’ve never seen Cobra convertible Fox bodies, so we wanted to build one, and I think we did a hell of a job. So is this the last you’ve seen of this car? I don’t know, maybe, maybe not, but in the meantime, thanks for watching stage 3 of AmericanMuscle’s project Fox body.

Customer Photos

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15 Questions / 16 Answers

Ask a Question

Can I run this cam with a turbo?


  • Yes, this cam is actually very good with turbos, I have it in my 89 TT. Sounds awesome too!


    Good Answer (1) (0)

Show 2 more answers Question Resolved

Hi I run an 88 fox body and am wondering if this cam will work in it? There is no mass flow sensor in the cold air intake so will it still work or no? I wouldn't be concerned if it wasn't for the fact that in one of the other questions answers there was mention of a mass flow sensor issue. if this cam wont work for my car what would be the next best thing? thanks n advance


  • according to ford motorsports this cam works with a mass air flow sensor and if you have automatic transmission you need a higher stall converter . it will not work with a speed density car .


    Good Answer (0) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

I am building a high comp 331 stroker! The dome pistons i have selected are +9.0cc, and stock heads for now with stock lifters, Do I need to worry about piston to valve clearance? And is this an appropriate cam for a cruiser/weekend warrior?


  • need to always check piston to valve clearance !


    Good Answer (1) (0)

Show 2 more answers Question Resolved

I have a bone stock '87 with a 302. I have always heard that this cam works best with the stock set up?


  • You will need to convert your car to mass air to use this cam. '87 Mustang's use a speed density air metering system and the car won't run correctly without the mass air meter.


    Good Answer (7) (0)

Show 4 more answers Question Resolved

what valve springs should i run with e303


  • Okay it depends on if you are using your stock heads?? With any of the Ford Motor Sport Cams I would say to get best power results with your cam go to GT-40 or Gt40P or after market heads but just to let you know the springs will need an up grade using any of these cams.


    Good Answer (0) (0)

Show 1 more answer Answer This Question I need this answered (0) (0)

I'm sure its been answered a million times but I cant find an answer anywhere........Do i need to buy one or two of these for my 94? I am swapping out to GT40 iron heads. What do I need to be looking at as far as springs?


  • For your 94 GT you will only need to buy one Ford Performance E303 Performance Camshaft (85-95 5.0L). Please see the installation notes for more details about the springs.


    Good Answer (0) (0)

Question Resolved

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Customer Reviews (19) Write a Review

Overall Rating 4.8

out of 5 stars

Installation Time:Weekend

Installation Cost:$250-$500

  • Performance Gain 4.538462 4.5
  • Fit 4.846154 4.8

  • 5/5

    August 13, 2016

    E 303

    Got the camshaft have not installed it yet but I'm pretty sure it will sound good from the reviews I've read thank you American Muscle.


    Year: 1986 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    April 04, 2016

    Awesome upgrade

    This cam was just what the doctor ordered . Great sound great performance


    Year: 1985 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    July 20, 2015

    got this for gt40 setup

    Bought this cam for a new 308 build good cam sounds good...easy install I also added ford racing lifters when doing this. This cam really need gears


    Year: 1992 Submodel: Other leland NC

    Helpful (1) (0)

  • 4/5

    Installation Time: Shop Install

    May 19, 2015

    Great sound top end.

    The E-cam is a great top end performer. I don't quite agree with the claim of "excellent Low and Mid range torque". Mid range perhaps but imo this cam doesn't really start to sing until beyond 2,500 rpm. However, once it hits it's sweet spot it screams. I'm running a 4.10 so it gets there in a hurry. The best part though has to be the sound. At idle, cruising speeds and beyond, it snarls. I've had guys back off just because of the way it idles. Of course a lopey idle doesn't make you unbeatable but it was a nice ego boost! For exhaust I'm running BBK LT's, H-pipe and Magnaflows. FYI, this combination has passed California smog test at certified, smog only locations.


    Year: 1990 Submodel: Other

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $500-$1000

    December 12, 2014

    Good cam, for my application

    My application is a street rod daily driver. I have almost every engine upgrade you can think of besides a power adder. Got everything from AM because it was cheaper then everywhere else. Anyways this cam is good for a daily driver or a car that sees strip time sometimes. The reason I got this cam is because I knew it was a bolt in and I wouldn't have to modify my pistons. I have a decent tune in my car right now, and the cam actually feels somewhat radical. It sounds a little louder then stock and I have to keep my foot on the pedal at a red light to keep it from stalling out. This cam does not like power bands between 2200 rpm WITHOUT a tune. This cam practically begs the driver to apply gas. With my tune the car shakes a lot unless I give it gas. Overall good cam. I recomened if you want a reliable daily with a silky smooth install. If you want more power I suggest going with comp.


    Year: 1995 Submodel: GT bay area

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    June 16, 2013


    Great street/strip cam. Good mid range pull. Lopey idle. Combined with long tubes, o/r X or H pipe and dumped exhaust. Don't expect to get your order right through the drive-thru. Because they won't be able to hear you.


    Year: 1997 Submodel: GT Kansas, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Weekend

    September 28, 2012

    Sounds great!

    Sounds great and good on gas. Made a difference in hp maybe a 10-15.


    Year: 1986 Submodel: GT Fort Worth, TX, USA

    Helpful (1) (0)

  • 5/5

    May 26, 2010

    e303 FRPP

    Great cam, it sound like a real muscle car at idle! go for it!


    Helpful (35) (0)

  • 4/5

    November 18, 2009

    E303 cam

    best cam for every day driver or drag strip racing! sounds great, gives you that drag car sound! good torque to!

    jim webb

    Helpful (39) (5)

  • 5/5

    March 31, 2011

    Ford Racing E303 Performance Camshaft 5.0/5.8 (85-95)

    Thanks American Muscle, the camshaft really made a big difference in the performance and sound of my car. Excellent complement to my Cobra intake and GT40X heads

    David Gonzalez

    Year: 1989 Submodel: Other

    Helpful (12) (1)

  • 5/5

    February 09, 2011

    i like it

    i have one of these in my 94 gt with gt40p heads and an edelbrock performer 5.0 intake manifold. it works very well and sounds great. it does mess with the computer of a 94-95 but not as bad as some others. i do plan on putting some crane 1.7 rockers on soon to give it a little more lift. it is hard to beat the quality and price of a ford cam.

    Joshua Beasley

    Year: 1994 Submodel: GT

    Helpful (13) (2)

  • 5/5

    Installation Time: Weekend

    March 31, 2012

    Classic Muscle Idol!

    Im just turned 17, it took me about 2 days to install this cam and lifters. No one in my family knows anything about cars so i was on my own. This is great cam, nice loopy idol and i noticed a nice H.P gain. Its a nice lil cam to so you wont need to shorten your push rods or replace rocker arms, i didn't even need to shim them. Over all a Great cam for my 94 GT. Suggest you replace timing chain and cam gear, new roller lifters also recommended,


    Year: 1994 Submodel: GT Commerce MI

    Helpful (7) (0)

  • 5/5

    Installation Time: Weekend

    December 12, 2011

    Awesome Power Gain for my applicaiton!!

    i've got a 91 GT with a 5.0 from a F150 in it, i have port and polished 351w heads with a stock rebuild, had the stock F 150 cam in it so the e303 was quite a power gain powerband seems to be from about 2500 - 5500 rpm on the butt dyno i would say around 40 horsepower could be more but i spin most of the way thru 2nd now and only had a chirp before, that was my application tho. great choice!!


    Year: 1991 Submodel: GT Gainesville, Fl

    Helpful (4) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $250-$500

    April 27, 2013

    great cam for sn95 stangs

    this cam has made my car come to life,,my 306 is running great with this cam,,lots of top end and great bottom end,,it shuts up a lot of corvettes,, a must for all 5.0 owners


    Year: 1994 Submodel: GT louisville,ky

    Helpful (2) (0)

  • 5/5

    Installation Time: Shop Install

    September 28, 2011

    E303 Camshaft

    This was a great starter cam. Has great idle, and lope. Horsepower increase is pretty good too.


    Year: 1990 Submodel: Other Elverson, PA

    Helpful (3) (1)

  • 4/5

    Installation Time: Afternoon

    December 08, 2011


    it has great bang for the buck have alot of other mods but yousure can hear and feel the cam


    Year: 1993 Submodel: Other Orlando FL

    Helpful (1) (0)

  • 5/5

    June 27, 2011

    E303 cam

    Just want to say thanks to American Muscle, the cam I purchased is giving me good power and torque, and sounds amazing threw my flow master mufflers.


    Year: 1995 Submodel: GT

    Helpful (2) (1)

  • 5/5

    Installation Time: Afternoon

    May 30, 2016


    This cam was very good for power and also the lopey sound everyone likes to hear. Had no regrets with this one will be doing more business with them


    Year: 1989 Submodel: GT

    Helpful (0) (1)

  • 5/5

    Installation Time: Full Day

    December 29, 2015

    Nice cam for the price, sound amazing. ..

    Sounds good.....installation wasn't bad.. got my parts quickly wat i thought. ....


    Year: 1994 Chesapeake

    Helpful (0) (0)

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