ARP 3/8-24 in Thread Nut - 1/2 in 12 Point Head - Chromoly - Black Oxide - Universal - Set of 10 300-8391 Helmet Wiring Kits resulting in faster exhaust speeds

resulting in faster exhaust speeds to improve exhaust scavenging

and filter extension when applicable

compact design to fit most EFI applications

Clip On Wire Markers

Can be used to extend 3/8"-24 shifter rods

ARP 3/8-24 in Thread Nut - 1/2 in 12 Point Head - Chromoly - Black Oxide - Universal - Set of 10 300-8391 Helmet Wiring Kits resulting in faster exhaust speedsARPs 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: Nut 3 8 24 in Thread 1 2 in