SKU: ALL 25980
UPC: 848238016239
MPN: ALL25980
The Carb Spacer 4150 Open .500in by Allstar Performance is an essential component for carburetor tuning and engine optimization in both street and competition applications. This open-style spacer sits between your 4150-pattern carburetor and intake manifold, creating precise distance that allows cooler air charge, improved fuel atomization, and enhanced manifold vacuum distribution.
Engineered with a .500-inch height, this spacer provides the ideal compromise between intake plenum volume increase and practical hood clearance on most builds. The open design—absent internal passages or baffles—ensures unrestricted airflow and simplified installation without sacrificing carburetor signal integrity. Allstar Performance's precision machining guarantees tight bore concentricity and parallel mounting surfaces, critical for sealing integrity and preventing vacuum leaks.
This spacer accommodates standard 4150 bolt patterns and accepts all common gasket styles, making it compatible with virtually every mainstream four-barrel carburetor in the aftermarket. Technicians and enthusiasts building small-block or big-block engines—from street applications to circle-track and drag racing—will find this spacer beneficial for optimizing performance.
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.
