ARP Nissan Main Stud Kit - L24/L26/L28 6-Cylinder 016440NRRS You can use a large

You can use a large even if your neck is smaller to give more room over a collar bone

To this point

Will not accept rail rocker arms

Sportsman and similar classes

Single-Layer Pyrovatex® FRC Construction

ARP Nissan Main Stud Kit - L24/L26/L28 6-Cylinder 016440NRRS You can use a largeARPs 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: Main Stud Kit 12 Point Nuts