This piston set is perfect for car enthusiasts who want to upgrade the performance of their Saab 9 - 2X Aero (2005) or Subaru Impreza WRX (2002 - 2005). It's great for high - performance driving and racing scenarios. The set features a 79mm + 4mm stroker, 92.5mm + 0.5mm bore, and an 8.5:1 dish piston design. It uses strong 2618 alloy forgings and comes with premium chrome moly wrist pins.