Wiseco Subaru WRX 4v R/Dome 8.4:1 CR 93mm - Single Piston

This listing is for a single Wiseco forged piston, designed for Subaru WRX 4v engines with an 8.4:1 compression ratio and a 93mm bore. It's built from 2618 aluminum, a material chosen for its strong tensile strength, making it well-suited for demanding performance builds. The piston features precision ring grooves, an anti-detonation groove, and other features aimed at improving ring seal, which is crucial for consistent power delivery and engine health under stress.

Wiseco has applied an ArmorGlide skirt coating to this piston. This coating helps reduce friction between the piston and cylinder wall, leading to quieter operation and improved seizure resistance, especially important in high-performance applications. The crown is fully machined, and the design includes forced pin oiling to ensure the wrist pin stays well-lubricated. These pistons are intended for heavy to severe duty race builds where durability and performance are paramount.

Please note that this part is not CARB approved and cannot be shipped to California. It's designed for specific performance applications and is sold individually.