Satin Hurricane Intake Big Block Chevy 'The Power+Plus HPR (High Performance Racing) is the ultimate big block single plane racing manifold. This manifold will perform with the best available at nearly half the price.Nitrous Bosses in port runners,Four corner water outlets,Dual distributor holddowns,Available with brass inserts in water jackets. This new manifold for Big Block Chevys is a worthy companion to our phenomenally successful single plane small block racing manifold. Designed for serious performance big block applications, it features nitrous bosses, dual distributor holddowns, four corner water ports, and is intended for rectangular port cylinder heads. Runner size is effective for 468 to 540 cid engines. Note: Use Fel-Pro intake gaskets #1275. Use an 800 cfm or larger 4150 square bore carburetor. Picture shown is Show Polished version, not Satin Finish