Best Carburetor Spacers & Adapters of 2025

This Carburetor Gasket Kit is quick and easy to install, replacing the factory old part. It adapts square flange carburetors to 4-barrel intake manifolds, making it compatible with any 4bbl carburetor to any 4bbl manifold except Holley 4500 and original manifolds with exposed exhaust crossover tubes. The adapter measures 3/4' nominal height, without the gaskets. The kit includes gaskets, studs, nuts, and washers, and is made of diecast aluminum.

The Spectre Carburetor Adapter allows you to easily fit Holley, Edelbrock, and Carter AFB 4-barrel carburetors to a Quadrajet intake manifold. It features a heat-insulating phenolic center that helps maintain optimal temperatures, improving performance. The precision die-cast aluminum outer plate ensures a durable and secure fit for your carburetor. Additionally, this adapter comes with all necessary gaskets and hardware, making installation straightforward and convenient. You’ll appreciate the ease of upgrading your setup without needing extensive modifications.

The ApplianPar Carburetor Spacer is a 1-inch thick adapter designed for various carburetor models, including Holley and Edelbrock. Its open center design enhances airflow, which can improve engine performance and efficiency. This spacer fits square bore bases, making it versatile for different setups. Additionally, the package comes with gaskets, mounting studs, and nuts, providing everything you need for an easy installation. This means you can upgrade your carburetor system with minimal hassle, ensuring a better driving experience.

The liriuda Carb Spacer 2696 Adapter allows you to mount Edelbrock Square-Bore Carbs to stock Q-Jet & Thermo-Quad manifolds. It is designed to fit vehicles with OEM spread-bore intake manifolds, like GM vehicles with Rochester Quadrajet carburetors. This adapter plate helps increase intake manifold pressure at idle, enhances horsepower and torque throughout the RPM range, and provides improved throttle response. The package includes all necessary components for easy installation, preventing vacuum leaks and ensuring proper functionality.

The Edelbrock Carb Spacer is designed to help you easily install an Edelbrock square-bore carburetor onto a stock Quadrajet or Thermo-Quad intake manifold. With its 0.850" thickness and individual venturi ports, this adapter ensures a proper fit and optimal performance. It also enhances intake manifold pressure at idle, boosting horsepower and torque across the RPM range. This means you can enjoy improved engine response without needing to buy new components when changing carburetors or intakes, making it a convenient upgrade for many vehicles, including popular GM models.

The Trans-Dapt Carburetor Adapter is designed specifically for your vehicle, ensuring a perfect fit. With dimensions of 21.9 cm high, 6.0 cm long, and 18.4 cm wide, it is compact yet effective. Weighing in at just 0.487 kilograms, it is lightweight, making installation easier for you. Proudly made in the United States, this adapter reflects quality craftsmanship. Whether you're upgrading your carburetor or enhancing engine performance, this adapter offers a reliable solution to help you achieve your goals.

The JEGS Carburetor Adapter Kit makes it easy for you to install a square flange carburetor onto a spread bore manifold. With its precision-machined design, this adapter is .750 inches thick, providing a sturdy connection. The kit includes everything you need, such as gaskets, studs, and hardware, simplifying the installation process. However, it's important to note that this adapter is not suitable for intake manifolds that have ported vacuum, heat crossover, or EGR systems. Overall, this kit offers a convenient solution for enhancing your engine's performance.

The SHLPDFM Carb Spacer is designed to enhance your vehicle's performance. It fits 4-barrel carburetors with a square bore base, like the Holley 4150/4160. The 2-inch thickness is crafted from phenolic material, which effectively insulates and reduces heat transfer. This helps you achieve a denser air/fuel mixture, boosting both power and efficiency. Additionally, the package comes with mounting hardware and gaskets, providing convenience for installation. With its open design, this spacer increases the plenum volume, improving high RPM power while also enhancing low-speed and mid-range torque.

The Mr. Gasket Carburetor Adapter is designed to enhance your vehicle's performance. Its open center allows for improved air and fuel distribution, ensuring a smoother operation. Made from durable die-cast aluminum, this adapter is built to last. With a thickness of 3/4" (excluding gaskets), it provides a solid fit for your carburetor. The kit includes all necessary hardware and gaskets, making installation a breeze. You can enjoy a hassle-free setup without needing additional parts, getting you back on the road faster.

The HENKYO Carburetor Spacer is a 1-inch aluminum alloy adapter designed for enhanced performance in your vehicle. Its four-hole design ensures a smooth flow of air and fuel from the carburetor to the intake manifold, which can significantly boost engine performance. Additionally, this spacer helps to insulate the carburetor from engine heat, promoting better efficiency. It also provides extra clearance for linkages, making installation easier. Note that this modification is best suited for experienced mechanics, as changing the manifold gasket can greatly impact the engine's performance.