GM HD TIMING CHAIN - 12646387GM Heavy Duty Timing Chain 12646387 This is a heavy duty single roller chain that uses an improved alloy steel and the sideplates have an increased thickness to improve strength. If your are making cam change or a basic freshen up on your engine, then you should consider replacing the timing chain. This chain can be used on all LS engines and can be used with stock gears. NEW GM PART# 12646387 REPLACES OLD GM PART#'s 12646386 and 12586482

2 liter engine with cathedral port heads

Part Number 24255748 Part Type Clutch Brand Chevrolet Performance Vehicle 2005-2013 Corvette Z06

This spring kit uses all OE hardware

Diameter (lower body) 50mm

which increases stiffness

Genuine GM Flex Fuel sensor

These parts should be used for the following applications: Racing/Performance/Street Rodder where hood restrictions are NOT a consideration

max-effort engines and boosted applications

ensuring our valuable customers are not tricked into purchasing an inferior

They do not harden up or dry rot from excessive heat

100% hand welded construction

All PDS cams are 3-bolt timing gear pattern