SKU: HLY17-72
UPC: 090127477823
MPN: 17-72
The Holley 1-inch Carburetor Spacer 2300 Flange (part number 17-72) is a precision phenolic spacer block designed to create consistent standoff distance between a 2-barrel carburetor and intake manifold. Cast from phenolic material, this spacer delivers thermal insulation that reduces incoming air charge temperature—a critical advantage for maintaining fuel atomization and combustion efficiency in both street and competition engine builds. The 1-inch thickness provides measurable separation without requiring adapter fuel lines or complex plumbing modifications.
This spacer accommodates the Holley 2300 2-barrel carburetor and features a 2-hole flange pattern for secure mechanical connection. Phenolic construction delivers superior thermal properties compared to aluminum alternatives, effectively insulating the carburetor from engine block heat. The included gaskets and hardware ensure a complete, leak-free installation without sourcing additional sealing components. At 1.1 pounds and compact in footprint, it integrates cleanly into tight engine compartments while maintaining full fuel delivery and air intake function.
Engine builders, hot rodders, and tuners rely on carburetor spacers when optimizing carb-to-manifold geometry or reducing heat soak in high-performance applications. The Holley 17-72 addresses tuners who need repeatable thermal management without extensive modifications to fuel delivery systems. This solution performs in vintage restorations, street rod builds, and drag racing platforms where consistent air charge temperature directly influences mixture quality and throttle response.
Carburetor spacers occupy a specific niche in intake system tuning. Phenolic material has been the industry standard for decades because it resists thermal conductivity while maintaining structural rigidity under repeated thermal cycling. The Holley brand carries proven market credibility in carburetor components and fuel system accessories for performance applications across multiple engine platforms.
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