Cyber Week Deal Cp Shelf Pistons W/pins, Rings And Locks (subaru Ej257 Wrx Sti Stroker (83mm), 99.5mm Bore, 8.5:1) Grab It Now [aNp25hz4]

CP Shelf Pistons for Subaru EJ257 WRX Sti Stroker

Experience unparalleled performance with the CP Shelf Pistons designed specifically for the Subaru EJ257 WRX Sti Stroker. Engineered with precision for an 83mm bore and a 99.5mm stroke, these pistons are the perfect upgrade for your high-performance engine. The 8.5:1 compression ratio offers a perfect balance of power and efficiency, making them ideal for both street and track use.

Advanced Piston Features

The CP Shelf Pistons are equipped with a range of advanced features that enhance engine performance and longevity. The Anti Detonation Grooves, also known as Contact Reduction Grooves, protect the top ring by disrupting detonation waves, ensuring a smoother and more reliable operation. The Accumulator Groove, a V-shaped groove on the second ring land, collects excess blow-by, improving ring seal and reducing top ring flutter. The CP groove on the lower part of the top land equalizes pressure, keeping gas ports clear of carbon build-up and preventing smudging.

Quality Construction and Design

Crafted with X-Forgings, these pistons minimize friction and reduce weight without compromising strength. The use of bracing and ribs optimizes weight balance between high and low stress areas, allowing for a shorter pin for added strength and weight savings. The Radius Domes maximize quench and eliminate hot spots, further reducing the risk of detonation. The cam and barrel design, the result of extensive research and development, ensures tighter clearances, less noise, better ring seal, more power, and increased durability.