The COMP Cams® Vibration Absorber Carburetor Spacer prevents both high rpm lean out and irregular fuel atomization and insulates against power-robbing engine heat transfer. In dyno testing, the one-inch tall, billet aluminum space has been proven to eliminate harmful harmonics and vibration that can cause fuel dropout, netting increased hp potential and improved drivability. Built for use with 4150, 4500 and 2300 model four-barrel carburetors, both gasoline and alcohol application spacers are offered. The new COMP Cams® Vibration Absorber Carburetor Spacers feature shock resistant composite construction, making them compatible with all types of racing applications. Size to fit 5/8" through 2 1/8" O.D. have a corrugated stainless core with high tensile stainless braid covering and copper tube ends. - Components checked and inspected at various phases of assembly. - Ends accurately sized. - Final inspection.