JE Ultra Series Forged Pistons Mitsubishi Evo 4 5 6 7 8 9 4G63T 85mm STD -5 cc 10.0:1 set of (4).

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

Ultra Series Includes: 

• Grain Flow Optimized Forging
• Lateral Gas Ports 
• Ceramic Crown Coating 
• Perfect Skirt Coating 
• Accumulator Groove 
• Double Pin Oiling 
• Upgraded 9310 Pins and locks 
• Carbon Steel Nitride Rings