To create the manifold we took our Typhoon manifold for Small Block Fords and modified it to produce an open area under the plenum (commonly called an air gap). This then became our Crosswind model. This design allows ambient air to pass beneath the plenum which has a cooling effect on the incoming fuel/air charge thus producing more power. This isolation also keeps engine heat from transferring into the plenum chamber. This manifold has several unique features such as a rear water crossover passage which contributes to cooler running engine, nitrous bosses and 4 corner water ports.

• Suits Small Block Ford 289/302, will not suit 351W
• 1500-6500rpm range, ideal for a performance street engine
• Cast aluminium, natural finish
• Suits square bore 4 barrel carburettors 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.