Allstar Performance Holley 4500 Open Carb Spacer - 1" Thick 41012510 GM Fullsize Truck 2007-13

GM Fullsize Truck 2007-13

The internal arch support is not found in many motorsports shoes but greatly increses the comfort when wearing for an extended period

and unique backpack-style padded straps along with padded back support for a comfortable hands-free way to haul safety equipment

Ribbon Window Net is used and approved in all sanctioning bodies

but still only increases at a rate of 150 lb

Allstar Performance Holley 4500 Open Carb Spacer - 1" Thick 41012510 GM Fullsize Truck 2007-13Specially 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",