Function: valve spring tool used to disassemble the spring and install the spring | Compatible with LS Engine Firebird, Silverado, Camaro, GTO, Trans am, Corvette, CTSV, Sierra, Tahoe, Suburban, Pontiac G8 GT and more.Not for small block chevy engines | Valve spring compression tool for 4.8 5.3 5.7 6.0 and 6.2L LS engines,LS1 LS2 LS3 LS6 Series | Valve spring compression tool Replaces OE 67605 | 6 months warranty, factory inspected 100%, meets or exceeds original OE.Installation can be done by watching Youtube videos