ARP 8mm x 1.25 12 Point Nuts (10) Underwear Top 8 backing washers

8 backing washers

Stilo WRC DES/Trophy/ST4F/ST4W

3125" thick and includes ten 7/16"-20 x 1-1/4" UHL LH bolts

has two independent pressure adjustments: one for idle and one for wide open throttle

3/8"-16 thread on the opposite end and 12-point steel shoulder nuts to work with most headers

ARP 8mm x 1.25 12 Point Nuts (10) Underwear Top 8 backing washersARPs 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 8 mm x 1. 25 Thread 10