Pro Touring Headquarters GM LS .560" Valve Spring Kit with Seals offers an economically viable alternative for replacing failing OEM springs in ordinary applications. This kit features a .560" lift LS6-style valve spring - the same as GM's #12499224 or 12586484 - that provides equal or better performance than its factory-installed counterparts, all at a fraction of the cost. Combine the Kit with Brian Tooley or Texas Speed Truck Series Camshafts and you'll see substantial gains in your engine's performance.

Kit Includes:

PTHQ .560" Valve Springs

PTHQ LS Hat Seals

Spring Specs:

•100 lbs @ 1.800”

•285 lbs @ 1.240”

•Coil bind @ 1.150”