These conical springs are a huge upgrade to the oem LT1 Lt4 springs that are prone to breaking under high load and stress. These from BTR are an alternative to the heavy dual springs that add mass / weight (and zap away horsepower) to the engine's valvetrain. Swapping these into a healthy engine will add huge reliability and give you peace of mind. These are a plug and play swap with no tuning or modification needed. 

Bought new and never used, yup I just bought the wrong kit for my build after changing my mind a few times,  so my loss is your gain.   All original items in the kit included and in original packaging as pictured.

$300.00 new.

' Due to the nature of the OEM scroll-type rocker arms, use of higher lift cams and higher-than-stock spring pressures can accelerate valve tip and rocker arm pad wear.

 

BTR's new valve tip saver kit incorporates our newly designed BTR valve locks (and BTR retainers in certain applications) in conjunction with GM lash caps, to help save valve tips, eliminating costly repairs that require cylinder head removal and replacement of damaged valves. '