Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $5,000 For Your Mustang! Enter daily!

Ford Performance Boss Modular 5.0L Engine Block

Market Price $1,997.89 You Save 12% ($229.85)
Our Price


+ $99.00 Handling Fee with FREE Shipping

  • Item 50195

Will this fit your Vehicle?

In Stock Ships same business day.
Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features, Video & Details

    • Modular 5.0L Block (302 Cubic Inches)
    • 4.6L Deck Height
    • Cast Iron
    • Siamese 94mm Bore
    • 17mm Main Web Minimal Thickness
    • 4 Bolt Mains

    Review & Installation Video

    Review & Install Video

    Modular 5.0L. Now you can install a Ford Racing Boss Modular 5.0L Engine Block in your very own SN95 Mustang on the cheap. This block reuses everything from your stock GT's 4.6L V8, all you need to supply is a new set of larger pistons and brand new 5.0 is complete.

    Built Ford Tough. This Boss 5.0 iron block features a 4.6L deck height and a 94mm cylinder bore. It is cast in Ford's Cleveland plant using a proprietary iron mix to yield the strongest casting possible.

    Additional Features. Featuring a Siamese 94mm Bore and a 4 Bolt Main with interference fit nodular iron machined caps, this Ford Racing Modular 5.0L block has increased main web window size for less oil movement and greater power.

    Application. This Ford Racing Boss Modular 5.0L Engine Block is designed to be direct fit replacement for the stock 4.6L block of the 1996 to 2004 GT Mustang.

    Technical Note. This is a bare block, no internals are included. This block does not have a finished milled head deck or cylinder bores. Your engine builder will need to mill the deck and finish bore, then hone each bore specifically for the combination being installed.

    NOTE: Ships Continental 48 States ONLY. No Canada, APO/FPO, Hawaii, Alaska, Puerto Rico, Guam or Us Virgin Islands.

    If shipping to a business, please include the business name. Also, after your order is placed, be prepared to let us know if you will need a Lift-Gate service. You will be contacted via email before your order ships.

    Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 Details

    MPN# M-6010-BOSS50

    CA Residents: WARNING: Cancer and Reproductive Harm -

    What's in the Box
    • (1) Engine
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Boss 302 - 12, 13
    • Bullitt - 01, 08, 09, 19
    • Cobra - 93, 94, 95, 96, 97, 98, 99, 01, 03, 04
    • Cobra R - 93, 95, 00
    • EcoBoost - 15, 16, 17, 18, 19
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19
    • GT350 - 15, 16, 17, 18, 19
    • GT350R - 15, 16, 17, 18, 19
    • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 79, 80, 81, 82, 83, 84, 85, 86
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10, 11, 12, 13, 14, 15, 16, 17

      Customer Photos (7) Submit Your Photo

      View All 7 Photos

        Questions & Answers (66)

        5 Top Rated Questions

        will this fit the 2006 Mustang GT with an automatic? I am planning on upgrading different parts of the car?

        • Yes, this would fit a 2006 GT with automatic!

        Helpful (1)

        What all would I need to swap this into a 2007 GT

        • The Ford Performance Boss Modular 5.0L Engine Block is a 4.6L that is bored out to accept 5.0L displacment. This will accept all existing parts from your vehicle with the exception of the rotating assembly (Pistons, Connecting Rods, and Crankshaft), though this will benefit largely from a tune and cams as well.

        Helpful (1)

        Will this intake work on this block? Ford Performance BOSS 302 Intake Manifold (11-14 GT) Item 50179

        • This Ford Racing Boss Modular 5.0L Engine Block is designed to be direct fit replacement for the stock 4.6L block of the 1996 to 2004 GT Mustang. The use of the 1996-2004 GT heads will not allow the use of the Ford Performance BOSS 302 Intake Manifold.

        Helpful (1)

        It says that this block needs larger pistons. Do I need 5.0L pistons?

        • Yes, larger size 5.0l pistons specific for the modular 302 engines would be needed. This block is bare and only has a rough bore in it, so a .020-.030 " larger piston would be required in conjunction with custom machining to ensure a proper installation with this engine.

        Helpful (1)

        I'm currently rebuilding my Mach 1. I was going to get my heads block machined for new forged rods, pistons valve train etc... If I decided to use this block can I keep my machs 8 bolt crank? Can I keep my oem cams as well?

        • This Ford Performance Boss Modular 5.0L Engine Block would use all the same parts on your existing 4.6L block. So you should be able to keep your existing crankshaft and camshafts.

        Helpful (1)
        Post Your Question
        10 More Questions
        Application. This Ford Racing Boss Modular 5.0L Engine Block is designed to be direct fit replacement for the stock 4.6L block of the 1996 to 2004 GT Mustang. So from this description this block will bolt directly into a 4.6 engine bay? No trans mods or engine mount mods? 1 answer
        What is a good piston to go in this block? 1 answer
        how much HP can this take? 1 answer
        Will this work with my 2012 Mustang GT and are there any extras I need to do 1 answer
        If i buy this block .. 0.20 pistons will those work with it or do i have to buy 0.30. As i will be using my car for boost and also will the crankshaft from manley for 2V will it work in this? Thanks 0 answer
        Thinking about getting this block. But just wanted to see if the following parts will fit since more is needed. 3.40" stroker crankshaft (M-6303-C340), Sportsman Rods, 1.090" CD Pistons. If it dosnt fit, do you have any sugestions? Thanks 1 answer
        will any 4 valve heads fit? 1 answer
        Is this block able to pair with the scat 300ci stroker kit? what would you recommend as far as machining? Thank you 0 answer
        Are significant mods necessary to drop this Block into an 87-93 Foxbody? Also what 5 speed transmission would you recommend to compliment this potential project? 1 answer
        I have an SCTx4 tuner can I get a Bama tune for this block? 1 answer

          Customer Reviews (9) Write a Review

          Overall Rating 4.2

          out of 5 stars

          Installation Time:Weekend

          Installation Cost:$1000+

          • Performance Gain 4.777778 4.8
          • Fit 4.888889 4.9

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $1000+

            March 28, 2019

            Boss Modular 5.0 in a Terminator

            Just picked up my Terminator on 1st day of spring. After break in tune and final tune, started on e85 and all supporting mods to run corn. On top has a 2.6l KB I'm pleased with my new numbers 667/650... for now.


            Year: 2003 Submodel: Cobra

            Helpful (1)

          • 4/5

            March 07, 2019

            Do your homework

            Overall nice block, only problem is no one can tell me what 4 valve timing cover fits this.I have all new parts for this block except the cover ,i have 2, should fit but don`t.If your looking to build a 4 v motor don`t use this.


            Year: 2007 Submodel: GT

            Helpful (3)

          • 5/5

            Installation Time: Shop Install

            Installation Cost: $1000+

            February 12, 2019

            FP Boss 5oh Block

            Everything has gone smooth from the machining to the install. Great upgrade after my stock block was bad the stock heads minor upgrades Ford GT/GT500 rocker arms and new lifters, and upgraded to Diamond Pistons. Made 619/572 on e85 Lethal Performance Division X RSFS Dual Walbro's 465lph with a 3.25" pulley on the 2.6 Kenne Bell. Not 100 on the boost 17,18lbs.


            Year: 2003 Submodel: Cobra

            Helpful (2)

          • 4/5

            September 17, 2018

            Great all bore 5.0

            I think for modular, Pre coyote, this is about as good as it gets, less than liners and machine work on a aluminum block to get a big bore, cooling is improved, mains webbing is better, venting is better, the only downside is weight, about 6-10 pounds more as measured over a Romeo block, also I would not call this a true 4 bolt main, it’s 2 mains, and side bolts, also a big bore may not be the best for boost over 20. Just a heads up.


            Year: 2001 Submodel: GT

            Helpful (8)

          • 1/5

            October 23, 2017


            There are no machine shops in my area that can mill the deck. Better make sure you have one because American Muscle won't let you return it. I know because i tried and was told ne returns. Now i have a block That's just setting.


            Year: 1999 Submodel: GT

            Helpful (31)

          • 5/5

            Installation Time: Full Day

            August 03, 2017

            Quality built

            This is the block you want if you want to toughen up your 4.6 at a pretty good price it is very well built strengthened in the right areas


            Year: 2004 Submodel: GT

            Helpful (17)

          • 5/5

            August 02, 2017

            Boss 5.0 block

            Haven't finished the build yet, however, AM shipped quickly and it looks great. We will see....


            Year: 2004 Submodel: Cobra

            Helpful (14)

          • 4/5

            May 17, 2014

            5.0 modular block

            This block looks great came in pre painted black, it looks great. Now its off to the machine shop to finish the deck and bore.


            Year: 2002 Submodel: GT Detroit, MI, USA

            Helpful (13)

          • 5/5

            Installation Time: Weekend

            September 15, 2012

            BOSS 5.0

            Great Quality!!! Why have someone sleeve your old engine when you only have to do minor mashine work and have a solid block!!! Very fast shipping for the size of the item and direct drop shipment from FORD RACING.


            Year: 1998 Submodel: GT Culpeper, VA

            Helpful (19)

          Related Mustang Categories