GM Duramax LMM 6.6 Liter 12PT SS (street) thermostat housing bolt kit. These bolts properly engage the threads and resist loosening to help prevent coolant leaks. The compact 12-point head makes tight spots easier to reach.

Made from polished ARP Stainless, it resists rust and corrosion while delivering strength well beyond Grade 8 hardware.

Details:

• Material: Stainless Steel
• Finish: Polished
• Package Type: Skin
• Kit Type: Bolt

Fitment Notes:

• Engine Manufacturer: Duramax
• Engine Liter: 6.6 Liter
• Engine Designation: LMM