ARP Ford Head Stud Kit - 6.4L Diesel 4414XLGWH The “Governor” is a four-hole

The “Governor” is a four-hole aluminum spacer that accepts tapered inserts which can be changed quickly by removing the carb

This allows racers to reliably increase boost and advance ignition timing-without using high-octane racing fuel-for power gains of up to 20%

Silver Bullet throttle body spacers are constructed out of durable T-6061 billet aluminum and using a unique serrated/helix entry to create turbulence at the manifold while eliminating the annoying whistle found in other helix only throttle spacers

1978-1981 Chevrolet K20 Suburban

ARP Ford Head Stud Kit - 6.4L Diesel 4414XLGWH The “Governor” is a four-holeARPs 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: Cylinder Head Stud Kit 12