MMR 4.6 Street Mod 600 Shortblock (up to 600HP)

The perfect upgraded replacement for your forced induction or NOS Mustang GT. All factory parts bolt right on to make these a easy upgraded replacement shortblock built by the best in the world!



*Brand New Cast Iron Romeo Block, torque plate bored and honed

*New Ford Racing Cast Iron Crankshaft (6 bolt flange )

*New Forged MMR H Beam Rods 

*New Manley Forged Pistons & Chromoly Piston Pins

*Total Seal file fit rings (precision file fit to your application, nitrous, blower, turbo or N/A)

*Clevite Rod and Main bearings

*Complete Pro Assembly and Balancing for the smoothest, highest revving shortblock available, Pre-Lubricated with Royal Purple Assembly Lube and spin tested. Lastly 3 technicians sign off on your new engine prior to packaging and crating.

* 6 Month Warranty (please see "terms & conditions" for details)

*Due to the custom nature of MMR shortblocks ALL customers paying with a credit card will be billed when the order is placed (prior to engine assembly and shipping), All MMR shortblocks are non-refundable regardless if the item has shipped or not.

  • Model: 400600


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