The Bostech DEC011638 Valve Cover Bolt Insulator from XDP is a direct-fit replacement for the dry rotted insulators on your GM 6.6L Duramax engine. When replacing the valve cover gasket, it is recommended to replace the bolt insulators to ensure a leak-free repair. Constructed from high-quality materials this insulator provides OE-style quality and fitment.
Features:
- Sold Individually
- Quality Construction
- OE-Style Replacement
Manufacturer Warranty*:
13-Month / Unlimited Mileage
13-Month / Unlimited Mileage
Note: 14 Insulators per side required (28 Insulators total per vehicle)