This auction is for a brand new set of CP Pistons for the Subaru WRX & STi EJ20 / EJ25 / EJ257 engines. CP makes several Subaru part numbers and we try to keep many of the popular part numbers in stock. Just select which part number best fits your application from the list below, and include that part number in the paypal notes section of your payment.

CP Pistons is one of the most trusted names in the industry, and for good reason. Their extensive shelf catalog provides the user with many of the options that you'd normally be resigned to going to a custom piston for. Their standard offering already includes Dual Pin Oilers - providing double the amount of oil to the wrist pin, radiused valve relifs, and the pin fitting final hone on the wrist pin bore. They even include an Accumulator Groove as a standard option. This provides a small pocket for the combustion gasses to collect after the first ring, reducing ring flutter and providing a better seal allowing more downward force on the piston A.K.A. - make more power. All pistons come balanced within one gram, include pin lock grooves and wrist pins at no additional charge.

When building an engine, there are several components you will need to replace, and many you will want to replace. We suggest ACL Race Bearings, Cometic Headgaskets, and ARP Headstuds at the very least. After that, if you are interested in building the entire engine, we can help you pick out a cam and valvetrain package that best suits your application . Please email us at Sales@RealStreetPerformance.com about our package deals.

Suggested Accompanying Parts

ACL Full Engine Bearing Set	ARP Headstuds
Cometic Headgasket	Brian Crower Cams and Valvetrain