![]() MAHLE PowerPak Pistons for WRX 2.5L STi Legacy 99.50mm Bore WRX209917I10 Product Description Bore (in):3.917 in. 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 Mahle PowerPak
package. ![]() Find more products in our Store
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