Carb Spacer 604 Crate 1/4in Thick Alum

The Carb Spacer 604 Crate 1/4in Thick Alum from WEHRS MACHINE is an essential intake manifold component designed for GM 604 crate engine builds and performance carburetor applications. Built by mechanics and engine builders who understand that every fraction of an inch impacts air distribution, fuel atomization, and overall engine response, this carburetor spacer elevates intake charge velocity and thermal management in competition and street-performance vehicles. Whether you're tuning a square-bore four-barrel setup or optimizing airflow characteristics on a budget-conscious build, a quality carb spacer is non-negotiable for consistent jetting and engine behavior.

Manufactured from black anodized aluminum, this 0.25-inch thick spacer features a four-hole mounting pattern compatible with square-bore carburetor flanges and GM 604 engine block intake ports. The 1/4-inch thickness is engineered to provide measurable heat insulation between the carburetor and intake manifold, reducing fuel vapor lock and promoting cooler, denser charge air into the cylinders. The anodized finish resists oxidation and corrosion while maintaining a professional appearance, and the compact footprint (measuring 6.9 x 1.55 x 8.05 inches) integrates seamlessly into tight engine bays without requiring hood clearance modifications.

This carb spacer benefits builders and enthusiasts working with square-bore four-barrel carburetors on small-block and crate engine platforms, particularly those seeking improved idle quality, reduced fuel percolation, and enhanced throttle response during street or strip duty. Installation requires only standard gasket sealer and fasteners; the lightweight 0.55-pound design imposes no measurable penalty on engine response. Compatible with GM 604 crate motor configurations and any carburetor featuring a four-hole square-bore mounting pattern, it pairs excellently with traditional carb-to-intake gaskets and standard intake manifold gasket sets for a complete seal.