Allstar Performance 2" Phenolic Carb Spacer - Open Spacer PH-MAC3 2007-2008 GMC Sierra 3500 HD

2007-2008 GMC Sierra 3500 HD

Fuel Cell Bulkhead

Fuel pressure rises on a 1:1 ratio when referencing boost

2A/1 Rated

At Aeromotive

Allstar Performance 2" Phenolic Carb Spacer - Open Spacer PH-MAC3 2007-2008 GMC Sierra 3500 HDSpecially 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",