Moroso 1/2" 4-Hole Phenolic Carburetor Spacer - Fits Holley 4150/4160 Bolt Pattern - 4-Hole Plenum Design w/ 1.467" Diameter Bores 110018 When tightened the "O" ring

When tightened the "O" ring is compressed

2 Youth Helmet incorporates the same advanced technology

Brackets adapt U

Silverado 2500 2004-1999

Moroso 1/2" 4-Hole Phenolic Carburetor Spacer - Fits Holley 4150/4160 Bolt Pattern - 4-Hole Plenum Design w/ 1.467" Diameter Bores 110018 When tightened the "O" ringAdvanced phenolic compounds are specially formulated to reduce heat conductivity 10 times greater than aluminum Reducing fuel temperature inside the carburetor results in a denser, more powerful fuel charge to the manifold Insulating phenolic spacers come pre drilled for alignment pins and include all mounting hardware Gaskets not included Moroso Performance Products is one of the worlds most respected suppliers of automotive equipment for racing and