Cyclone Big Block CHEV Dual-Plane Intake Manifold, Oval Port, Street, BBC

This manifold is a stock replacement/street legal part for 396, 402, 427 and 454 V8s with OEM 4-bbl carb; 1965-’72 (1973 non-CA) passenger cars and 1966-’83 trucks, Suburbans and heavy vehicles, except stock equipped EGR. This manifold design includes nitrous bosses, dual distributor holddowns and 4 corner water ports. This manifold also includes a special carb adaptor to allow the use of aftermarket square bore carburettors. This is an excellent street performance manifold. It will not fit under the hood of Corvettes without hood modifications.

• Suits Big Block Chev 396, 402, 427 & 454 with oval port heads
• 1500-6500rpm range, ideal for a high performance street engine
• Cast aluminium, natural finish
• Suits square bore 4 barrel carburetors and throttle bodies

Calflow manifolds are cast in high pressure steel dies rather than the pour-in sand molds used by other aftermarket manifold manufacturers. This type of tooling costs 2-3 times more than conventional sand-cast patterns, but the finished product is worth the additional expense. And because the cores (which form the internal ports and water passages) are mounted in steel instead of sand during the casting process, there is no chance of any core shift, which sometimes go undetected in sand castings.