Big Block Chev Air Gap Dual Plane Intake Manifold Oval Port Black

Unlock peak carbureted power for your Big Block Chevy with the Air Gap Dual Plane Intake Manifold. This black, Hi‑Rise intake features large oval ports and a dual plane design that delivers a steady, even air‑fuel flow across a broad RPM range, specifically tuned for high‑displacement engines and oval‑port heads. Key benefits you’ll feel on the dyno and on the street - Air Gap Dual Plane configuration improves low‑to‑mid range response while maintaining strong high‑rpm breathing, helping torque come on earlier and power carry into the upper range. - Large oval ports are optimized for 396–502 CID Big Block Chevy engines paired with early oval‑port heads (1975 and earlier), delivering efficient airflow alignment and improved breathing compared to generic intakes. - Hi‑Rise, race‑style design provides the breathing room you need for high RPM performance without sacrificing usable power at street speeds. - Finished in a rugged black, the manifold looks as bold as it performs, making it a visually striking upgrade for street or strip use. What sets it apart - Non‑EGR design preserves air flow and throttle response in non‑emissions builds, helping maintain consistent performance. - Carburetor mounting pad supports aftermarket square‑bore carburetors with either manual or electric choke options, simplifying upgrades and tuning. - Dual distributor hold‑downs, four corner water ports, and a front water outlet offer flexible cooling routing to fit a wide range of cooling system layouts. - Oval‑port compatibility ensures better alignment with classic heads, unlocking more efficient cylinder breathing than many generic intakes. Applications and compatibility - Specifically designed for Big Block Chevy engines in the 396–502 CID range. - Compatible with large oval‑port cylinder heads (1975 and earlier). - Most installations accommodate late model water necks, air conditioning, alternator, and HEI ignition systems with standard clearances. - Intake runners are intended to be port‑matched to your cylinder heads for optimal power delivery. Performance and tuning notes - Purpose‑built to keep air and fuel flowing consistently into the cylinders, maximizing power and efficiency in carbureted big‑block setups. - For best results, port‑match the intake runners to your heads and calibrate the carburetor for your carburetor pad and fuel pressure. - The dual‑plane, high‑rise design excels in high RPM applications while still delivering usable power at lower engine speeds when paired with the right cam and exhaust setup. Installation considerations - Plan cooling routing around the dual water ports and front outlet to suit your cooling system layout. - Prepare for a thorough fitment check with your square‑bore carburetor, distributor setup, and accessory clears (water necks, AC, alternator, etc.). Why choose this manifold - Specifically targets high‑RPM, large‑CID Big Block Chevy builds without EGR complications, preserving strong airflow and throttle response. - Oval‑port compatibility unlocks greater breathing efficiency with classic heads for more consistent, wide‑open throttle performance. - Rugged black finish and Hi‑Rise design provide both visual appeal and tangible performance benefits for street sessions and track days.