ARP Rocker Arm Stud Pro Series 5/16-18" Base Thread 5/16-24" Top Thread - 1.000" Long H778C31XL Popular 8-bolt brake rotor is

Popular 8-bolt brake rotor is commonly used on the rear of modifieds and stock cars and features a 32 non-directional vane design which allows this rotor to be used on either side of the vehicle

Pull-Down adjusts to 24"

small block Ford street/strip head

Getting this much flow from a stock geometry 23° head is an extremely impressive accomplishment

The RZ-56 Air includes minimal front venting and a Top Air Accessory to run Forced Air

ARP Rocker Arm Stud Pro Series 5/16-18" Base Thread 5/16-24" Top Thread - 1.000" Long H778C31XL Popular 8-bolt brake rotor isARPs 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: Rocker Arm Stud Pro Series