Mahle PowerPak 100mm Bore Piston and Ring Kit Subaru WRX / STI EJ25 2004-2021 Vehicle Make_Saab Piston Ring Size 1

Piston Ring Size 1

The extra force generated from the high speed fluid is handled by the piston and shim cage while still monitored by the slow-bleed orifice

Setrab Oil Coolers employ an in-line turbulator to gently stir the fluid being cooled

The Process West Top Mount Intercooler Kit is engineered to be the ultimate no-compromise cooling upgrade for Subaru WRX

Mahle PowerPak 100mm Bore Piston and Ring Kit Subaru WRX / STI EJ25 2004-2021 Vehicle Make_Saab Piston Ring Size 1Part #: 930285037 Mahle's PowerPak piston assemblies include forged pistons, piston rings, pins, and wire locks all in one race proven package. The pistons are hand deburred and then coated with dry phosphate to protect against ring micro welding and pin galling during initial startup. For additional performance, Mahle added its proprietary Grafal anti friction coating to the piston skirts. Low drag rings, steel pins, and round wire locks complete the