SKU: HLY17-27
UPC: 090127033500
MPN: 17-27
The 1in Carburetor Spacer from HOLLEY is an essential modification for carbureted engine builders and performance enthusiasts looking to optimize intake manifold dynamics and tune air-fuel distribution. This precision spacer sits between your carburetor and intake manifold, creating critical distance that allows for improved fuel atomization and more consistent fuel delivery across all cylinders. Whether you're building a street machine, restoring a classic muscle car, or fine-tuning a competition engine, a quality carburetor spacer is foundational to achieving smooth idle quality, better throttle response, and measurable gains in fuel economy.
HOLLEY's 1-inch spacer design works by elevating the carburetor above the manifold, which allows fuel vapors to separate and cool before entering the intake tract while simultaneously reducing heat soak from manifold hot spots into the carburetor bowl. The added height also changes the plenum geometry, which can improve air velocity characteristics and reduce cylinder-to-cylinder distribution errors common in cast-iron manifolds. This spacer is machined to precise tolerances and designed to maintain proper fuel float bowl level and carb mounting integrity, ensuring no modifications to fuel lines, linkage, or existing carburetor hardware are required.
Carburetor spacers benefit most owners of small-block and big-block engines running Holley four-barrel carburetors on stock or performance manifolds. This modification is particularly effective on naturally aspirated engines where manifold vacuum signal quality and fuel atomization directly impact throttle response and part-throttle drivability. Installation is straightforward: simply unbolt your carburetor, slip the spacer onto the manifold studs, and remount the carb—gaskets and hardware are handled with standard intake gasket sets. Verify carburetor clearance to hood and linkage routing before final assembly, and plan to re-jet or recalibrate idle mixture as baseline tuning may shift slightly with the spacer installed.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
