The BTR HD Timing Chain is a heavy-duty single roller timing chain built for GM Gen III/IV LS-Series engines produced from 1997 through 2009, and is also compatible with GM Gen V LT-Series engines. It is designed as a direct cross-reference to GM part number 12646386.
- Part Number: BTR46386 (cross-reference to GM 12646386)
- Application: GM Gen III/IV LS-Series engines, 1997-2009
- Additional Compatibility: Also fits GM Gen V LT-Series engines
- Style: Single roller, heavy-duty
FAQ
Which LS engines fit the BTR46386 timing chain?
The BTR46386 is built for GM Gen III/IV LS-Series engines from 1997 through 2009 and cross-references to GM part number 12646386.
Is the BTR46386 a single or double roller chain?
It is a heavy-duty single roller timing chain.
Does the BTR46386 replace the factory GM timing chain?
Yes, it is designed as a direct cross-reference replacement for GM part number 12646386.
Does the BTR46386 fit Gen V LT engines too?
Yes, in addition to Gen III/IV LS engines from 1997-2009, the BTR46386 is also compatible with GM Gen V LT-Series engines.

