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Ford Performance B303 Performance Camshaft (85-95 5.0L)

Item 24068
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      Review & Installation Video

      If you're after a bunch of lope and a solid increase to both mid and high range power, the B303 cam from Ford performance would be an excellent choice for your '85 to '95 5-liter Mustang. Now, the B303 roller cam will require the use of aftermarket valve springs for both stock or aftermarket EDs and will be recommended mainly for stick cars out there but AOD guys can get in on the fun when using an aftermarket stall. Price point for the cam by itself will be in the high hundred dollar range. And the install, according to the site, will get a full-blown three out of three wrenches on the difficulty meter and about a day's worth of work depending on your expertise. So, the good old alphabet cam debate rages on, right? B-cam, E-cam, F or X, which is gonna be the right one for me and my 5-liter? Well, listen guys, I'm not here to stoke that debate. However, what I am going to do is talk to you a little bit more about that B-cam and what it will deliver. So, right off the bat, guys, the B-cam is going to be a little bit peakier thanks to its longer duration when compared to that other very popular choice in the alphabet cam lineup, the E303. In fact, you're looking at 224 at 50 with the B-cam compared to 228 at 50 with the E-cam for reference. So, that basically means, again, the B-cam is going to perform very well above 3000 RPM. Whereas that E303 cam is going to be a little bit better for street use, thanks to its lower end or broader power band. Now, because you are getting more duration here with the B303 cam you are also giving that awesome idle which can make the car a little rough around the edges on the street in regards to overall drivability and, well, idle. Now, despite having more overlap, the B-cam is slightly smaller compared to the E303 when we are talking about overall lift, as the B-cam is gonna come in at 480 thousandths of lift compared to the E-cam's 498 thousandths, both when using a 1.6 rocker. Now, expect those numbers to increase slightly by 30 thousandths when using an upgraded 1.7 rocker. But going back to what we said earlier about power band, and it is very important to point out, guys, that Ford Performance is gonna state the B-cam should primarily be used with stick car application unless, of course, you're running a little bit more gear along with a converter in your AOD equipped Mustang. Another big thing to consider, guys, is that going with the set of GT40 heads or something similar that will move more air will ideally maximize potential of the B303 here. Now, the B-cam will also accept stock pushrod length but again will require the use of aftermarket valve springs providing you with at least 120 pounds of seat pressure along with 295 pounds while open. Now, the specific spring or part number will differ depending on which head you end up going with, so just make sure you reference the site depending on your setup. Now, as far as your install is concerned, well it's not going to be for the novice mechanics out there. So, that's why the site did kick this one up to a full three out of three wrenches on the old difficulty meter, while calling the job at least a day or so to get completed, but that really does depend on your expertise when doing this type of work. But wrapping things up, guys, if you're looking for a legendary budget-friendly camshaft to provide your 5-liter with a little bit more power and a lot more lope, then you should definitely be checking out the Ford Performance B303 Camshaft right here at

      Product Information

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


      • Street Performance
      • Excellent Replacement Cam
      • Hydraulic Roller Lifter
      • Sold Individually
      • For 1985-1995 5.0L with 1.60 Rockers


      Street Performance. This Ford Racing cam is a excellent replacement choice for good low-end torque, a significant increase in top-end power above 4,000 RPM, and a fair Idle.

      Legendary Ford Racing Quality. When you're adding performance parts to your Pony, you can't go wrong by installing parts from the folks that know it best. Ford Racing's legendary quality ensures a perfect fit and years of hassle-free use.

      Required Upgrade. This Ford Racing B303 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 B303 Performance Camshaft is designed for use in the 1985-1995 5.0L V8 Mustangs with a roller cam block and 1.60 rockers.

      Technical Notes. Ford Racing recommends the use of a Hi-Stall torque converter for Mustangs equipped with automatic transmissions. Performance camshafts work only on EFI engines with mass air induction systems.

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

      MPN# M-6250-B303

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (29)

      Write a Review

      Ratings Summary

      5.0 out of 5 overall rating from 29 customers

      Installation Time: Afternoon

      Installation Cost: $250-$500

      • January 09, 2020

        5 1989 LX - Conejoracing Installation Time: Full Day

        Helpful (0)
      • November 22, 2019

        5 1989 GT - Bry96 Installation Time: Weekend

        Mo powa baby

        Haven’t installed it yet but I’m so ready to shipped out pretty fast also

        Helpful (0)
      • March 24, 2019

        5 1987 GT - Good Installation Time: Full Day

        Better performance

        I note a good performance after change b303 is very nice

        Helpful (0)
      • January 04, 2019

        5 1989 LX - TroyL Installation Time: Full Day

        Bcam mafia

        Yet to install but i needed for than just valve springs to do this .you should a brand top end for whoever is thinking about getting a csmshaft.lifters.pushrods.rockers

        Helpful (4)
      • August 01, 2018

        5 1995 GT - GaryD Installation Time: Afternoon

        B303 cam awesome

        the price and being an original ford part was outstanding

        Helpful (6)
      • May 12, 2018

        5 1988 GT - Shane Installation Time: Afternoon


        Just got done break in, good power range with my set up has a nice chop to it too

        Helpful (7)
      • April 12, 2018

        5 1990 LX - PeytonR Installation Time: Weekend

        Great bang for your buck

        This cam install was pretty straightforward and went pretty smooth. I paired this cam with a set of heads as well. Granted it does take the computer awhile to adjust its self without a tune I did bump the timing up 2 degrees and installed a Wideband just for safety. If you’re debating whether or not you should by this cam stop! This is a must have for any fox. Thank you American Muscle for always putting out great products.

        Helpful (10)
      • April 03, 2018

        5 1990 GT - DavidM Installation Time: Afternoon

        B303 Camshaft

        After hearing one of my friends car with this cam I had to have it for mine. Now this thing sounds like a monster. I love it.

        Helpful (11)
      • October 05, 2017

        5 1995 GT - RalphC Installation Time: Full Day

        Great Upgrade

        Cam gave my 1995 Mustang an increase in horse power. Love the throttle response I now have

        Helpful (13)
      • July 05, 2017

        5 1988 LX - CecilH Installation Time: Afternoon


        Got this to replace my old cam, came fast and is of great quality. Can't wait to install it to hear it.

        Helpful (10)

      Questions & Answers (29 answers)

      5 Top Rated Questions

      Have a 95 gt with as far as I know, a stock engine. Looking for extra horse power without breaking the bank. AKA my wife. So if I install this cam will all other stock components work with it? Also how much extra hp can I expect? Thx. Alan

      • You would need upgraded valve springs with these camshafts to get the correct seat and open pressures for the valves. There would be an expected up to 30-40 hp gain with this cam.

      Helpful (3)

      can u use 1.7 rockers to get a little more lift

      • These are only compatible with 1.6 rockers.

      Helpful (2)

      What's the correct pushrods Length for this B303 application. I have a stock bottom end with gt40heads intake, new comp cam springs and valve seals, edelbrock 1.6 rockers ?

      • The Ford Performance B303 Performance Camshaft will allow for the stock pushrod length to properly fit. The GT40 Heads will also accept the stock length. If you would like to upgrade your pushrods, we would recommend the Ford Performance brand which I have provided the link for you.

      Helpful (2)

      What comes with this B303 cam? Do i have to purchase the 1.60 rockers seperate?

      • Correct, rockers are not included with this B303 cam.

      Helpful (2) Show 2 more answers

      Is it very necessary to replace the rockers?

      • This cam would be designed for the 1.60 rockers. If you do not have the 1.60 rockers you would want to look into changing the rockers out.

      Helpful (1)
      10 More Questions
      b303 w/ speed density I own a 87 Gt Convertible with speed density. is this cam working or I need to swap to MAF? Someone says it has hunting idle problems and drivability issues....thanks 1 answer
      what torque converter and valve springs do i need? 0 answer
      I have 95 5.0 that I am the upgrading heads but I am converting it over to a carburetor fuel system. Will this cam and roller lifers still work with the carburetor. 0 answer
      can i use this in a 94 351w roller 0 answer
      what size stall converter needed for this cam 1 answer
      What valve springs and locks do you recommend for installing the B303 in a stock 1995 Mustang GT 5.0? The springs I see all recommend an installed height of 1.8", the stock springs on the 95 are installed at 1.6". It looks like the grooves on the exhaust valves are machined lower than on the intakes. 1 answer
      Will the b303 work with stock push rods and rocker arm on a 1986 ford mustang gt 5.0 302? 1 answer
      Hey A.M. I have a 94 gt. The pushrod Windsor 5.0. OK so got all the bolt on's ect. Besides the 1.60 rockers do I need to make other adjustment's on my engine? MAF? Compatible with stock cylinder heads? 1 answer
      will the b303 or the e303 camshaft work in a 1986 mustang gt 302 ho with flat top pistons 1 answer
      If I’m going to put this cam in my car do I need to get it tuned or will the bama chip make everything run smooth? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Camshaft

      Tech Specs

      Ford Racing Data Sheet
      Part Number: M-6250-B303 Rocker Ratio: 1.60
      Lifter Type: Hydraulic Roller Lifter Engine Type: FORD 5.0 (1985-1995)
      Lobe-Center Int. 107° Lobe-Center Exh. 117°

      Intake Exhaust
      Valve Lash: Hyd. Hyd.
      Duration: 284° 284°
      Duration @ .050" Lift: 224° 224°
      Valve Lift: 0.480 0.480
      Lobe Lift: 0.300 0.300

      Valve Timing @ 0.05" Lift: Open Close
      Intake: 5° BTC 39° ABC
      Exhaust: 49° BBC 5° BTC

      Will It Fit My Mustang

      • Cobra - 93, 94, 95
      • Cobra R - 93
      • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95
      • LX - 87, 88, 89, 90, 91, 92, 93
      • Other - 85, 86

      Fits 1985-1995 5.0L V8 Mustangs with 1.60 rockers

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