Allstar Performance Holley 4500 4-Hole Carb Spacer - 1" Thick 23011606 5 x 5 Wheel Bolt

5 x 5 Wheel Bolt Pattern

1975-1978 GMC K25 Suburban

The BR1 Top Plate Kit includes the top plate and the small insert screws to attach the plate to the helmet

GM Fullsize SUV / Truck 2014-19

Allstar Performance Holley 4500 4-Hole Carb Spacer - 1" Thick 23011606 5 x 5 Wheel BoltSpecially designed for drag race applications to isolate carburetor from manifold, spacers prevent horsepower robbing heat transfer and increase the distance from the bottom of the carburetor to the manifold plenum for better air flow. Spacers are CNC machined in the U. S. from a polymer compound able to withstand temperatures up to 400F. Available in open or four hole versions for 4150 and 4500 series Holley and Holley style carburetors in 1 2", 1",