ARP Hex Nuts Main Stud Kit 4-Bolt Mains Chromoly Black Oxide - Aftermarket Block 4101XXLBK Box may be bolted through

Box may be bolted through the bottom for more permanent mounting

Water Pump / Exhaust Mount

Center hole accepts 1-1/4" tubing and has two 3/8" mounting holes spaced 2-1/4" apart

Box of 250

ARP Hex Nuts Main Stud Kit 4-Bolt Mains Chromoly Black Oxide - Aftermarket Block 4101XXLBK Box may be bolted throughARPs 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