Professional Products 57026 Crosswind Oldsmobile 400, 425 and 455 intake manifold. Features a natural satin aluminum finish. Powerband of 1500-6500 rpm. This is the only high performance high rise dual plane manifold available for the Oldsmobile engine. It features a number of unique enhancements. The Crosswind design which provides an air gap under the plenum helps cool the intake charge for maximum power production. It features a square bore carburetor pad which is 1 1/4" taller than competitive dual plane manifolds which further enhances the power producing capabilities. Works well with Holley, Demon, Edelbrock, Quick Fuel and Proform carburetors. The manifold can be drilled and tapped for nitrous nozzles. TECH NOTE: Hood clearance must be checked as this manifold is approximately 1 1/4" taller than a stock manifold. Professional Products 57026 Crosswind Oldsmobile 400 425 455 intake manifold 1500-6500 rpm 57026 We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.