JE FSR Forged Pistons Mitsubishi Evo 4 5 6 7 8 9 4G63T 94mm Stroker 86mm +1.0mm -18.6 cc 9.0:1

This is the newer FSR (Forged Side Relief) skirt style. JE is slowly transitioning all of their applications over to this superior design. The FSR forging allows unmatched strength while shedding unnecessary weight through machining. In short, they are light, and strong, and they are the future of pistons. JE has lead the Piston market since the very beginning. All of the big boys making noise in the industry right now use JE because of their superior design and strength. This is a top of the line piston that one would use to build the ultimate street engine or a reliable race engine. All pistons come balanced within one gram, include pin lock grooves and wrist pins at no additional charge.

MITSUBISHI 1999-2007 EVOLUTION VI - IX / 4G63 22MM PIN

• Crown requires no deburring or preparation
• 2618 T6 high tensile forged aluminum
• NEW ASYMMETRICAL FSR forging! State of the art asymmetrical skirt technology reduces friction and mass while providing a more rigid and durable platform (Skirt Style F).
• In this environment, higher boost levels or heavy nitrous usage necessitate JE's wrought 2618 alloy.
• FSR pistons include offset pins for quiet operation.
• Dished pistons feature new Smooth Finished Crown process for excellent flame travel.
• 1.0 x 1.2 x 2.8mm ring widths
• .866 x 2.250 straight wall carbon steel wrist pin provided.
• Pin fitting and wire locks included
• Part numbers 208477 & 254006 have 1.2, 1.5, 3.0mm Ring Pkg (Skirt Style R)