| Our ARP 12 point black oxide head bolts & washers sets are made from super strong 180,000 PSI bolts. That's a full 15% stronger than even grade 8 bolts. They work great for high horsepower and/or highly stressed applications with our new STEALTH aluminum cylinder heads, factory cast iron heads, Edelbrock Performer RPM aluminum heads, or any other heads that use stock length bolts. |