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

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    Features, Video & Details

    • Improved Street Performance
    • Great for Naturally Aspirated Mustangs
    • Hydraulic Roller Lifter
    • Sold Individually
    • For 1985-1995 5.0L with 1.60 Rockers

    Review & Installation Video

    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.

    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

    MPN# M-6250-E303

    CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

    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?

      Customer Photos

        Questions & Answers (44)

        5 Top Rated Questions

        will i need to get a tune with this cam?

        • This Ford Performance E303 Performance Camshaft will not require a tune, however, a tune would be beneficial to get the most out of the upgraded camshaft.

        Helpful (5)

        i have a 5.0 out of a 93 bronco, i am putting it in my 89 mustang. will this cam work in that engine?

        • Hello! Unfortunately, we can only confirm fitment for a 85-95 5.0 Mustang.

        Helpful (2)

        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!

        Helpful (2) Show 2 more answers

        If you are a daily driver but races from time to time would a E3O3 camshaft be better or a B3O3 for the best hp gain? Also I am ok with lowering gas mileage.

        • Both the Ford Performance E303 Performance Camshaft and B303 Performance Camshaft will work for street or strip use. The biggest factor used to decide between the two will be the rest of the components in your build, as this can be used to determine which cam will complement the remainder of your mods best. The B303 will have more duration, and more overlap, but less lift than the E303, leading to a power band that will typically peak higher than the E303, but will also start at a higher RPM. Additionally, the B303 will have a rougher idle.

        Helpful (1)

        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 !

        Helpful (1) Show 2 more answers
        Post Your Question
        10 More Questions
        Hello, will this work in a 351w 5.8 efi out of a 1989 f150? And if not do you have a cam close to this and doesn't require doing any major mods? I cant seem to find one anywhere, Thank you!! 1 answer
        Will this cam fit in my 1975 351w (non roller block) with retro fit lifters? 1 answer
        If i have a stock mustang GT 1994 this camshaft only replace de stock camshaft or is necessary change the stock rockers or another pieces. (i see you recommended change the valve springs and i think change, only wanted know to if other pieces is necessary change ) 1 answer
        How is this cams performance in a speed density car? 88 LX 5.0 all stock except a cartech powerbox 0 answer
        E303 Cam along with upgraded heads (ford performance X2 for example), any other intake/fuel mods needed? Tune? 0 answer
        I've got a 351w to put in my '84 mustang and have heard good things about this cam, but in applications on a 302. Will it fit my 351w motor even though it has a different firing order from the normal non-H.O. 302? I'm fine with replacing valve train components (lifters, rockers, etc.), I just want to be sure it will actually work and run fine. 1 answer
        I have stock e7 heads and I’m thinking about buying this cam. What valve springs would you recommend for this cam? 1 answer
        I'm looking at putting the e303 in my 94 5.0, besides valve springs any other parts you would recommend switching out ? 1 answer
        What is the CARB OE number for this cam? 1 answer
        I have a few questions. How hard is the install for someone that’s new to this stuff? Can you access the camshaft without pulling the motor? And what do you have to pull to access the camshaft? 1 answer

          Customer Reviews (33) Write a Review

          Overall Rating 4.8

          out of 5 stars

          Installation Time:Full Day

          Installation Cost:$500-$1000

          • Performance Gain 4.576923 4.6
          • Fit 4.923077 4.9



          • 5/5

            Installation Time: Afternoon

            July 22, 2019

            Camshaft

            The camshaft is Working really good it’s an amazing part love mustangs

            AnaG

            Year: 1988 Submodel: GT

            Helpful (0)

          • 5/5

            Installation Time: Full Day

            January 16, 2019

            Cam upgrade

            Good quality, fast shipping, great technical support.

            SteveW

            Year: 1987 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Afternoon

            September 04, 2018

            Perfect

            The perfect camshaft for a mild build , if you are looking for a nice lope, great sound without changing a ton of parts , or spending a ton of money this is the cam for you

            Stangman77

            Year: 1989 Submodel: GT

            Helpful (7)

          • 5/5

            Installation Time: Afternoon

            April 12, 2018

            Great Cam

            This a perfect cam for good torque and good midrange power. Perfect for daily street use. Gives a good muscle car throaty sound. I've used this in a Fox Body and SN95. A very good affordable cam.

            AndrewP

            Year: 1994 Submodel: GT

            Helpful (12)

          • 4/5

            Installation Time: Afternoon

            December 01, 2017

            Good for the money

            The instal was straight forward tho the results felt a little different than expected. At first it felt slightly improved but I think that was on part of the computer after about 1hr breaking in so the computer learns the new specs the performance increases another bit.

            JoseR

            Year: 1990 Submodel: GT

            Helpful (13)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $500-$1000

            November 03, 2017

            Perfect

            Put on some GT40P Heads with the upper and lower intake. Along with some other basic bolt-ons, and I can't wait to get it to the dyno to see how much power I'll make. This is perfect for street/strip use. Even though there are better cams out there this the best for the money, daily driveability.

            Carlos

            Year: 1995 Submodel: GT

            Helpful (10)

          • 5/5

            August 25, 2017

            Angry Muscle Car

            I can't express how much this cam has changed the way people view my fox. The performance and sound of my car has changed tremendously, I would highly recommend this to any foxbody owner!

            88fox

            Year: 1988 Submodel: GT

            Helpful (13)

          • 5/5

            Installation Time: Afternoon

            August 24, 2017

            E303

            E303 cam works great. Installed gt40 p heads, gt40 intake, e303 and car pulls now. Poor man build. Great upgrade from stock.

            Greasers1

            Year: 1990 Submodel: LX

            Helpful (22)

          • 5/5

            Installation Time: Afternoon

            August 20, 2017

            Im in Awe!

            I love this cam, its like I am driving a whole new beast!. This cam works great with my GT40 Heads and new lifters and push rods. Best purchase that iv made so far.. Maybe besides gears lol

            AustinC

            Year: 1993 Submodel: GT

            Helpful (12)

          • 5/5

            April 11, 2017

            Great product!

            This is a good bang for the buck. Nice sound and great performance upgrade.

            Stangboy89

            Year: 1990 Submodel: LX

            Helpful (10)

          • 5/5

            April 05, 2017

            E303 cam

            Have not installed it yet however I have had many many mustangs in the past and has always been my go to camshaft. Can't wait to get it on there with the new headers and other parts

            SeanT

            Year: 1995 Submodel: GT

            Helpful (13)

          • 5/5

            Installation Time: Weekend

            March 20, 2017

            94 GT carbureted

            I'm more than satisfied with the E303 cam. It takes a little to kick in but great for the streets. It sounds great at idle.

            Chris

            Year: 1994 Submodel: GT

            Helpful (11)

          • 5/5

            Installation Time: Weekend

            February 22, 2017

            Awesome!!

            This is a really good street cam. take a little bit for it to kick in but its well worth it :)

            TJ

            Year: 1994 Submodel: GT

            Helpful (14)

          • 4/5

            Installation Time: Weekend

            February 07, 2017

            Solid cam!!!!

            This a a very good street cam or strip cam. Installed in my 94' cobra, idle sounds a lot better from stock and am getting a lot of low end torque and high rpm power! Great product. Ford Racing!

            Grant

            Year: 1994 Submodel: GT

            Helpful (14)

          • 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.

            Dee

            Year: 1986 Submodel: GT

            Helpful (13)

          • 5/5

            Installation Time: Afternoon

            May 30, 2016

            Cam

            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

            Bighoss

            Year: 1989 Submodel: GT

            Helpful (12)

          • 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

            Radarluv

            Year: 1985 Submodel: GT

            Helpful (13)

          • 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. ....

            furious

            Year: 1994 Chesapeake

            Helpful (11)

          • 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

            glenn92lx

            Year: 1992 Submodel: Other leland NC

            Helpful (12)

          • 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.

            GeraldP

            Year: 1990 Submodel: Other

            Helpful (13)

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