2in. X 5 1/8in. A/C Rise

The 2in. X 5 1/8in. A/C Rise is a precision air cleaner spacer engineered for carburetor-fed engines requiring improved induction geometry and enhanced airflow dynamics. This component serves as a critical bridge between your air filter assembly and carburetor flange, lifting the filter housing to optimize cold-air intake patterns and reduce hot-engine-bay air recirculation. Whether you're building a classic muscle car, restoring a vintage truck, or tuning a custom engine platform, this spacer addresses a fundamental intake design limitation that affects both performance and reliability.

Constructed from durable black plastic, the 2in. X 5 1/8in. A/C Rise features a 5-1/8 inch carburetor flange aperture that ensures true bolt-on compatibility with standard four-barrel and two-barrel carburetors. The two-inch vertical rise creates physical separation between the filter element and heat source, allowing cooler ambient air to reach the fuel mixture without thermal degradation that typically occurs in tight underhood spaces. This design principle is foundational in performance engine building—cooler intake charge density directly correlates to improved combustion efficiency, more consistent jetting, and measurable power gains. The lightweight 0.32 lb construction minimizes parasitic load while maintaining structural rigidity under normal engine vibration and temperature cycling.

Experienced engine builders and restoration specialists rely on this spacer when baseline induction temperatures run hot or when tight engine compartments force the air cleaner into thermally compromised positions. Installation is straightforward: the spacer sandwiches between your existing carburetor and filter housing using original fasteners—no drilling, fabrication, or auxiliary hardware required. This product proves invaluable on street machines, vintage restorations, and carbureted performance builds where intake air temperature management directly influences fuel atomization, cylinder scavenging, and overall engine responsiveness. Verify your carburetor flange diameter matches the 5-1/8 inch specification and confirm adequate underhood clearance for the added two-inch height before purchase.