JE Pistons for Subaru STI EJ257 100mm Bore CR 8.5 KIT Set of 4 Pistons Sensors and easiest to use ECU

and easiest to use ECU upgrade solution for your Subaru

Consider the Xtreme or Fury ECUs

Max RPM: 9

Cooper Rings are oversize (also fits for oversize bores)

JE Pistons for Subaru STI EJ257 100mm Bore CR 8.5 KIT Set of 4 Pistons Sensors and easiest to use ECUDIMS: 10. 25 x 5. 75 x 5. 5 SUB: Forged EJ Pistons As the leader in forged racing pistons, JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import and sport compact applications. Engineered, forged and machined 100% in the USA, JE Pistons are designed for each specific engine and racing application to provide the ultimate combination of durability and performance. From drift track to drag