Intake: 0.4" max valve lift, 1.215" installed height, 39 lbs. seat pressure, 136 lbs. open pressure; Exhaust: 0.4" max valve lift, 1.215" installed height, 39 lbs.seat pressure, 136 lbs. open pressure. Kit Contents: 12 CrSi valve springs (6 intake/6 exhaust), 12 titanium valve spring retainers (6 intake/6 exhaust), 12 H.T. steel shims (for intake valves), 12 steel base washers (6 intake/6 exhaust).

• Compatible with boosted or turbocharged applications
• 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
• Designed with increased spring rates and high lift compatibility compared to the stock springs
• Made in the USA