ARP Stainless Steel Bolt Kit - 12 Point (5) 5/16-18 x 1.250 15-NEC-CAR Indexing positions the ground strap

Indexing positions the ground strap of the spark plug properly for best piston dome clearance and un-shrouds the electrode for a more even burn and possible gains of 5-15 horsepower

Replacement spindles for 1979-88 GM cars

Exact stall speeds will vary depending upon displacement

Exhaust Manifold

Kickdown bracket attaches to the bottom of Allstar’s adjustable throttle brackets

ARP Stainless Steel Bolt Kit - 12 Point (5) 5/16-18 x 1.250 15-NEC-CAR Indexing positions the ground strapARPs 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: Bolt 5 16 18 in Thread 1.