Originally posted by 1 Lucky Texan
At the very least I think you should get a refund on the new pistons. The reason the stocks have a slightly offset wrist pin is to reduce piston slap! I do agree a longer/different skirt design might do the same. However this all points to the same conclusion. Your new pistons are poorly designed for your application.
1 Lucky Texan
Why ariaspistons.com produced bad pistons for EJ 20 ?
ARIAS PISTONS, the leader in sport compact pistons, now offers Subaru WRX piston kits for the EJ20 engine. Forged from high-tensile billet aluminum, ARIAS PISTONS feature fully machined external features for maximum strength and minimum weight. Designed for extreme street or race, turbo or nitrous applications. These shelf-stock kits come complete with 8.5:1 compression ratio .50 mm oversize pistons, case-hardened wrist pins, severe-duty rings and pin locks