Supertech Valve Spring/Retainer/Seat Set 02-14 WRX / 04-17 STI

Computer designed to ensure that wire stress levels do not overpass the limits of stress defined in the diagrams of fatigue. We also utalize computer software that allows us to ensure that the harmonics are under control. This combined with our high quality steel alloy enables supertech valve springs to be more durable in extreme conditions, giving your performance racing engine a serious competitive advantage in both performance and durability.

Supertech retainers are manufactured with high quality military certified Titanium alloy, and are CNC machined for a tight fit.