ARP Main Bolt Kit - Side Bolts - 12 Point Head - 8 mm Thread - 2-Bolt Mains - Chromoly - Black Oxide - Cast Block - Ford Modular 12101 571 in Insert OD

571 in Insert OD

Very strong from mid-range to high end torque and horsepower for LS engines with cathedral port cylinder heads

The Pusher

Over 120 models in stock

Mallory Unilite / E-Spark

ARP Main Bolt Kit - Side Bolts - 12 Point Head - 8 mm Thread - 2-Bolt Mains - Chromoly - Black Oxide - Cast Block - Ford Modular 12101 571 in Insert ODARPs 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 Bolt Kit Side Bolts 12