ARP 134-7401 Thermostat Housing Bolt Kit for CHEVROLET LS. 20mm UHL. 8740. 12pt ymm_38 the exhaust has been designed

the exhaust has been designed to deliver both power and torque gains throughout the rev range

Specifications Socket Size(s) 1/2 hex OAL 1 (Qty: 4) 1

There also is a comfort mode

With the use of the optional Akrapovič Sound Kit

Larger-diameter tubing improves exhaust gas flow

ARP 134-7401 Thermostat Housing Bolt Kit for CHEVROLET LS. 20mm UHL. 8740. 12pt ymm_38 the exhaust has been designedAvailable in a variety of sizes to suit your needs, all ARP 12 point nuts are constructed from 8740 chrome moly steel or ARP 300 Series stainless steel material, and meet ARPs highest standards of quality. Rated at 180, 000 psi tensile strength, ARP 12 point nuts are manufactured in thick wall versions for optimum strength and rigidity and thin wall versions for applications with limited space requirements. All 8740 chrome moly steel nuts are black