MMX / Modern Muscle Xtreme Custom HEMI Engine Builders

At MMX / Modern Muscle Xtreme, custom Gen3 HEMI engines are more than a product line — they’re how we prove our parts in the real world. Every stroker short block and long block we build draws on decades of HEMI experience, in-house dyno work, and the same forged components we sell to shops and enthusiasts nationwide. Whether you need a street-friendly 5.7-based stroker or a high-horsepower 6.2/6.4 platform built for boost or nitrous, these engines are assembled to support serious power without cutting corners on the bottom end.

Modern Muscle Performance HEMI Stroker Engine Short Block Offerings

What sets MMX HEMI engines apart is the same hardware that made our name in the Gen3 market: custom-spec forged pistons developed with MAHLE for forced induction and nitrous, matched to forged connecting rods engineered with Molnar for a complete bottom-end package. Those piston-and-rod kits — along with our camshafts and supporting HEMI hard parts — have thousands of combined installs through our shop and respected builders nationwide, including high-profile programs like Arrington Performance. Track-tested, dyno-proven, and built for power you can trust: that’s the MMX difference.