MMR M4000R Racing Pistons The ultimate Modular piston has arrived! The MMR M2500R pistons are the only production piston track and dyno proven to handle up to 3000 RWHP in a modular application. No other Modular piston manufacturer can claim this or back it up! Over 5 years of research and development with MMR and Manley engineers along with testing by our MMR Pro-Mod, Outlaw and Extreme Drag Radial team bring you the finest piston ever for your 4.6 or 5.4 or 2011-2021 5.0 Modular application.
* Designed for Street and Race use
* Proven and tested by team MMR up to 4000RWHP!!!
* E85 Compatible
* MMR RED FIRE Dome Coating
* Full Banded Skirt for increased Piston Stability
* 1000hp Chrommoly Piston Pin comes std. (upgrades offered below)
* Thickest Ring lands in the industry
* Anti detonation groove standard
* 5.4/5.8 Specific design available with ZERO deck.
* Longest lasting and quietest pistons available.
* All compression ratios and bore sizes (have a custom need - call us)
