All of Professional Products intake manifolds incorporate many new features not found in competitive models. Some of today's most popular manifolds were designed 30 years ago and the makers have never bothered to update the tooling to include many of the new features desired by performance enthusiasts. Professional Products have engineered those features into their manifolds.
Common Features Include - Rear water crossover passages (Ford) - All ports very accurately positioned due to advanced casting techniques - Every tapped hole in each manifold is chased with a tap to clear polishing residue and assure the threads are not damaged - All polished manifolds are meticulously hand polished to show quality
The Cyclone is their lowest profile SB Chevy manifold and is also the only one that is street legal on pollution controlled vehicles. It is set up to accept a spread bore carb but comes with an adapter plate that permits the use of square bore carbs. To remain street legal with a square bore carb, you must use one that is also approved as street legal for your application. These are great all-around street manifolds for mild performance applications at affordable prices.
