ARP S/S 1/2-20 12pt. Nuts - (10 Pack) 41011510 while bolt kits are shipped

while bolt kits are shipped with the required flat washers

ORB-12 inlet and ORB-10 outlet ports

three generations of track experience

40-micron stainless steel replacement element

Black Paint

ARP S/S 1/2-20 12pt. Nuts - (10 Pack) 41011510 while bolt kits are shippedARPs 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 1 2 20 in Thread 9 16