MMR 5.4 Street Mod 900 Forged Shortblock - Lightning/GT500/F150

Starting at: $4,799.99

Handles Up to 900RWHP!

*NEW Cast Iron 5.4 Block , torque plate bored and honed

*New Forged Crankshaft w/micro polished journals at no extra charge -the strongest 5.4 crank available!

*New MMR 4340 6.658 H-beam Rods with ARP bolts

*New Forged Manley pistons with Chromoly Pins

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

*Clevite Performance 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 2 technicians sign off on your new engine prior to packaging and crating.


*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.

Add to Cart:

  • Model: 500900
  • Manufactured by: MMR

Please Choose:

Available Upgrades

5.4 Block Options

Your IP Address is:
Copyright © 2020 Modular Motorsports. Powered by Zen Cart