{"product_id":"big-block-chev-air-gap-dual-plane-intake-manifold-oval-port","title":"Big Block Chev Air Gap Dual Plane Intake Manifold Oval Port","description":"\u003cdiv\u003e\n\u003ch2\u003eBig Block Chev Air Gap Dual Plane Intake Manifold Oval Port\u003c\/h2\u003e\n\u003cp\u003eDesigned to extract maximum power from carbureted Big Block Chevy builds, this Air Gap Dual Plane intake manifold is engineered for 396–502 CID engines with large oval-port cylinder heads (1975 and earlier). Its Hi-Rise race-style design keeps air and fuel flowing aggressively at high RPM, delivering a steady, evenly distributed mixture for enhanced mid-to-high end performance.\u003c\/p\u003e \u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eOval-port runners tuned for large oval-port cylinder heads, optimizing airflow on 396–502 CID Big Block Chevys\u003c\/li\u003e \u003cli\u003eNatural cast finish with a square bore carburetor pad, compatible with aftermarket square-bore carburetors — manual or electric choke options apply\u003c\/li\u003e \u003cli\u003eNon-EGR configuration to preserve airflow and power delivery\u003c\/li\u003e \u003cli\u003eRPM operating range: 1500 to 6500, ideal for both street and high-performance applications\u003c\/li\u003e \u003cli\u003eHi-Rise race-style manifold designed for high RPM and large displacement engines\u003c\/li\u003e \u003cli\u003eCarburetor mounting pad accepts spacers and aftermarket carbs; dual distributor hold-downs for secure, race-ready installation\u003c\/li\u003e \u003cli\u003eFour corner water ports plus a fifth water outlet at the front facilitate robust cooling integration\u003c\/li\u003e \u003cli\u003eEngineered to keep intake air cooler and fuel delivery consistent, helping you squeeze every horsepower from your carbureted BB Chevy setup\u003c\/li\u003e \u003cli\u003eSupports late-model water necks, air conditioning, alternator, and HEI ignition systems in most installations, making it versatile for retrofits and rebuilds\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eFitment and installation notes\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eFitment: Big Block Chevy engines from 396 to 502 CID\u003c\/li\u003e \u003cli\u003eSpecifically compatible with large oval-port cylinder heads from 1975 and earlier, ensuring proper alignment and flow for peak power across the stated RPM range\u003c\/li\u003e \u003cli\u003eTo achieve optimal performance, port-match the intake runners to your cylinder heads and ensure a precise fit for best air\/fuel distribution\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePerformance advantages\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eHi-Rise design supports high RPM operation and large displacement, delivering strong mid-range and top-end power\u003c\/li\u003e \u003cli\u003eOval-port tuning enhances airflow efficiency on engines using large oval-port heads, contributing to more consistent fuel delivery and combustion\u003c\/li\u003e \u003cli\u003eNon-EGR configuration maintains maximum airflow, helping preserve horsepower on carbureted BB Chevy builds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":47266705768618,"sku":"AF6011-1001","price":539.5,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7829\/4698\/files\/s-l1600_1_7b31f7c8-92e0-483a-aa8f-baba64651a83.webp?v=1753407871","url":"https:\/\/tgmperformance.com.au\/products\/big-block-chev-air-gap-dual-plane-intake-manifold-oval-port","provider":"TGM Performance Parts","version":"1.0","type":"link"}