ARP Header Bolt - 3/8-16 in Thread - 1 in Long - 12 Point Head - Polished - Small Block Chevy - Set of 12 Oxygen Sensor For sanctioning bodies that mandate

For sanctioning bodies that mandate the use of a "stock appearing" converter

The ButlerBuil Sprint Car Front Axle Tether System and prevent the front axle from separation from the car during crash

Fully shot-peened surfaces for improved fatigue strength

1990-1993 Ford F-350

840 in Round Port

ARP Header Bolt - 3/8-16 in Thread - 1 in Long - 12 Point Head - Polished - Small Block Chevy - Set of 12 Oxygen Sensor For sanctioning bodies that mandateARPs product line contains thousands of part numbers, and has expanded to include virtually every fastener found in an engine and driveline. These range from quality high performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, IMSA, NASCAR and NHRA drag racing and marine applications. Since 1968, ARP is the fastener of champions and the world leader in fastener technology. Product Description: Header Bolt 3 8 16 in