Chevy LS1 & LS2 Thermostat Housing Bolts - UHL 20mm

Nobody likes water leaks.  And here's ARP's contribution to the solution.  These premium grade bolts are engineered to properly engage the manifold threads and resist loosening.  They're application-specific, and come in your choice of black oxide finished chrome moly, or rust-proof stainless steel, with handy 12-point or standard hex heads.  Washers included.