Features: Compatible with boosted or turbocharged applications. Designed with increased spring rates and high lift compatibility compared to the stock springs. CNC-machined titanium or H.T. (Heat Treated) Steel retainers and Cr-Si (Chromium Silicon) alloy dual springs provide valvetrain control at high rpms with high-performance camshaft capability. Made in the USA. Kit Includes: • 4x CrSi Valve Springs • 4x Titanium Retainers • 4x H.T. Basewashers.
