Enhance Subaru FA20F (DIT)’s performance with Supertech’s high-performance valve springs, the preferred choice of the world's best engine builders. Crafted from premium Superclean Chrome Silicon Vanadium Steel alloy, our valve springs deliver exceptional durability and performance at high RPMs. Each spring is computer-designed to maintain optimal wire stress levels and controlled harmonics, ensuring superior stability and longevity in extreme conditions. When paired with our high-quality, CNC-machined Titanium alloy retainers, Supertech valve springs provide your racing engine with a significant competitive edge in both performance and durability.