Sales Tax: Sales tax at Modern Muscle Xtreme (MMX) and its subsidiaries is based on State and local requirements. For more information, please reference our Sales Tax Policy page.

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MMX MMX-SNGL-WK2/WD Drop-In Plug & Play Single Fuel Pump Module for 11-21 Jeep Grand Cherokee 5.7L, SRT8 6.4L, SRT 392, 11-23 Durango R/T 5.7L & SRT 392 HEMI $799.95

From custom performance tuning options, CNC ported performance heads, custom grind performance camshafts, to superchargers we have what you need to take your SRT hot rod to …

2011 - 2017 Dodge and Chrysler SRT8 owners with the Gen 3 6.4L / 392 HEMI engine we have what you need here at ModernMuscleXtreme.com! With the ever increasing power of the …

Modern Muscle Xtreme is proud to offer cutting edge 5.7 performance parts for the R/T platform! From custom performance tuning options, CNC ported performance heads, custom grind …

Modern Muscle Xtreme is proud to offer cutting edge performance parts for the new Hellcat platform! From custom performance camshaft grinds, CNC ported performance heads, to …

Modern Muscle Performance offers in-house installation as well as other HEMI hotrod related services! We Currently Do Not Accept American Express. ModernMuscleXtreme.com …

MMX is a processor supplementary capability that is supported on IA-32 processors by Intel and other vendors as of 1997. AMD also added MMX instruction set in its K6 processor.

MMX Performance offers a wide range of precisely engineered BMW and MINI modifications, all designed in the UK for superior performance, style, and durability. Our premium BMW and …