ARP 12 point head bolt kit, 3/8"-16 x .750" UHC. Includes washers. Uses 3/8" 12 pt. socket. 170,000 PSI.
Each mild steel reducer comes with a welded-on 3-bolt flange, gaskets and bolts.
This exhaust wrap by Design Engineering, Inc. is made from pulverized lava rock and can stand 1800 degrees directly or 2500 degrees indirectly. Perfect for those extreme conditions and you don't need to use any spray-on coatings with it. Resists abrasion for longer life.
Works best on Stainless Steel headers.
Instruction Sheet (PDF)
Frequently Asked Questions (PDF)