The BTR Platinum LS Dual Spring Kit pairs a dual valve spring with steel retainers to support up to .660 in of valve lift on GM LS-series engines. This configuration uses .045 in locators sized for stock valve guides, and is a drop-in kit for 15-degree LS heads designed for use with stock rocker arms.
- Part Number: SK001/S/0545/BB
- Application: GM LS-Series, 15° Heads, Stock Valve Guides
- Max Valve Lift: .660 in
- Spring Type: Dual Spring (SP001-1)
- Spring Rate: 380 lb/in
- Spring Pressure: 155 lb @ 1.780 in installed / 380 lb @ 1.180 in / 400 lb @ 1.130 in open
- Coil Bind Height: 1.070 in
- Outer Diameter: 1.300 in
- Retainer Material: Steel (SR001S-1)
- Locator Thickness: .045 in
- Kit Includes: SP001-1 dual spring (qty 16), VL7°8MM-1 locks (qty 32), SR001S-1 steel retainers (qty 16), stock-guide locators (qty 16), VS LS valve seals (qty 16)
FAQ
What is the difference between the /0545 and /0560 SK001 kits?
The number denotes locator thickness: /0545 uses .045 in locators for stock valve guides, while /0560 uses .060 in locators. The spring, spring rate, coil bind, and retainer options are otherwise the same.
What retainer material does this kit use?
The SK001/S/0545/BB uses steel (SR001S-1) retainers.
What is the maximum valve lift supported?
This kit supports up to .660 in of valve lift on GM LS-series engines.
Does this kit fit LS7 or LS9 heads?
It is a drop-in kit for 15-degree LS heads and will typically also work with LS7 heads when used with a .030 in shim (BTR part SS030). It does not fit LS9 engines; BTR's SK006 kit is designed for LS9 applications.
