Mahle PowerPak 99.5mm Bore Piston and Ring Kit Subaru WRX / STI EJ25 2004-2021 Vehicle Model_Talon Keep your wideband monitoring system

Keep your wideband monitoring system operating at peak accuracy with the Innovate Motorsports Bosch LSU 4

its always a good idea to flush your entire system to prevent water buildup or air pockets from being present when you are driving

Part #: 476-880-6540SP

Type II bright dip anodized finish that looks great and protects against corrosion

Poise 400 at neg 40 degrees C

Mahle PowerPak 99.5mm Bore Piston and Ring Kit Subaru WRX / STI EJ25 2004-2021 Vehicle Model_Talon Keep your wideband monitoring systemPart #: 930285117 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