Hardware Kit 4160 Vacuum Secondary Carb

The Advanced Engine Design Hardware Kit 4160 Vacuum Secondary Carb is a complete fastener and spring assembly designed specifically for Holley 4160 carburetors. This hardware kit supplies all the clips, pins, screws, and springs needed for proper secondary carburetor function, making it essential for builders restoring, rebuilding, or upgrading Holley 4160 units to factory specifications or performance configurations.

Proper secondary operation in a Holley 4160 depends on correct spring tension, secure fastening, and precise mechanical geometry—specifications that this hardware kit ensures. The 4160 platform is engineered for progressive secondary activation, and the integrity of the secondary mechanism relies on OEM-grade fasteners and springs. This kit delivers those components in a single consolidated package, eliminating the need to source individual pieces and reducing assembly errors. Weighing just 0.43 lbs with compact dimensions (4.65 x 1 x 5.75 inches), the kit is organized for easy identification and installation.

This hardware kit targets engine builders, carburetor technicians, and performance enthusiasts rebuilding Holley 4160 carburetors for street, strip, or racing applications. Whether replacing worn springs, restoring a vintage carb to operational condition, or assembling a rebuilt 4160 core, this kit eliminates guesswork by providing purpose-matched components. It's particularly valuable for anyone sourcing parts piecemeal, as bulk fastener and spring sourcing can introduce compatibility uncertainty or missing specifications.

The Holley 4160 remains a platform of choice across hot rod, classic car, and performance engine builds due to its reliability, tuneability, and availability of quality components. Sourcing proper secondary hardware ensures that rebuilt or upgraded 4160 carburetors function as designed, maintaining consistent fuel delivery under acceleration and load changes.