Description
An ARP 12-point bolt kit for the lower rocker cover (valve cover base) on the LLY, LBZ and LMM Duramax.
- 12-point heads
- High-strength ARP steel with black oxide finish
- Application-specific lengths
Fits: 2004.5-2010 Chevrolet/GMC 6.6L Duramax LLY, LBZ, LMM
