ARP 180-1411 Header Bolt & Stud Kit for Oldsmobile 330-455. 1.670? OAL. 14 pieces ymm_82 plug inserts and plug nuts

plug inserts and plug nuts from the Akrapovič installation kit must be used to disable the backpressure sensors

7” L x 4

The full arrangement of the exhaust and link pipes is intended for racing track use only and is not intended for street use

Notice: This product does not meet emission compliance requirements for street or highway use

This gives the occupants of the car the option to regulate the exhaust tone by switching between the quiet mode and a sportier sound

ARP 180-1411 Header Bolt & Stud Kit for Oldsmobile 330-455. 1.670? OAL. 14 pieces ymm_82 plug inserts and plug nutsSpecifications Socket Size(s) 9 16 hex OAL (Qty: 14) 1. 670 Thread Size 3 8 nuts, washers included