Brian Tooley Racing BTR SK013/6545 Features:

We were first to market with a conical valve spring kit for Gen V LT engines. If your cam isn't too radical, a dual spring kit isn't required. These springs will vastly improve valvetrain stability at high RPM while still supporting up to .650" lift. This kit includes springs, locks, seals and locators. Uses stock retainers.

• LT4 engines require spring kit part number SK014, Pushrod replacement is highly recommended.