Carburetor Spacer Buyer's Guide - Breathing Room

JET Performance Products
The Power-Flo takes the lead in Quadrajet performance. The bore is designed to increase the velocity of airflow into the intake manifold. These are high-quality billet pieces, and it's important to note that JET also has seen larger gains when combined with its own programmers and intake kits.

Notes: Carburetor specific spacers are also available.

JET Performance Products
800.535.1161
jetchip.com

Holley
Cast out of aluminum, these kits come complete with gaskets and mounting hardware for an easy install. Holley also offers a four-hole, phenolic, 1-inch configuration. Try out Holley's 4150-4500 adapter plate as well.

Notes: Comes with PCV valve nipple.

Holley
270.782.2900
holley.com

Wilson Manifolds
Wilson's spacers use a variable-radius taper design to maximize airflow through the carburetor, which enhances air and fuel flow. Wilson provides a complete line of four-hole tapered spacers for 390, 4150, 4500, Q-jet, and two-barrel adapters.

Notes: Compatible with alcohol.

Wilson Manifolds
954.771.6216
wilsonmanifolds.com

Jomar Performance
Made from an advanced phenolic laminate, Jomar's Power Cone spacers prevent significantly less heat to the carburetor. Get these in either 4150 or 4500 baseplate configurations in 1/4-, 1/2-, 1-, or 2-inch designs.

Notes: Jomar also has more carb spacer styles to choose from.

Jomar Performance
248.322.3080
jomarperformance.com