Vehicles & Years Applicable:
- 2001-2004 Chevy Duramax Diesel 6.6L
- BOTH cylinder heads are pressure tested
- New injector cups installed
- 8th digit of VIN is "1"
- These heads have the protruding glow plug holes
- Brand new aftermarket casting, includes valve guides and valve seats, ready for assembly
- Highest grade aluminum material used in manufacturing
- Thicker decks for greater strength & Improved flow design to resist cracking
- Hardened exhaust seats (Stellite)
- CNC machined guides and 3 angle valve finish on all seats.