Proflow Cylinder Head AirMax 180 & Intake Kit, Manifold, AirMax, Aluminium, Black Square Bore, For Chevrolet, Small Block

Proflow Cylinder Heads & Intake Manifold Kit Kit Includes Proflow Aluminium Cyl Heads, Proflow Intake Manifold, Valve Covers , Intake Gaskets , Intake Bolts Proflow Cylinder Heads do not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of Engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302,351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, High Performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. Perfect for your Mild or High performance Hot Rod. Specifications: Cylinder Head Material: A356 Aluminium Combustion chamber: 64cc Intake Runner Volume: 180cc Exhaust Runner Volume: 70cc Intake Valve Diameter (in): 2.020 in. Exhaust Valve Diameter (in): 1.600 in. Maximum Valve Lift (in): 0.575 in. Lock Style: 7 degree Valve Stem Seal Style: Viton seal Guide plate Pushrod Size: 5/16 in. Rocker Stud: 7/16"-24 Valve Cover Mounting Style: Perimeter bolt Valve Angle: 23 degree Valve Guide Material: Manganese bronze Valve Seat Machine Style: 3-angle Valve Seat Material: Powder metallurgy Oiling Style: Through pushrod Number of Springs Per Valve: Dual Valve Spring Style: Standard Outside Diameter of Outer Spring: 1.470 in. Spring install height: 1.79 in. @ 130lbs Maximum Valve Lift (in): 0.575 in.@ 300lbs Proflows AirMax intake manifold for propular V8 engines features improved technology and design that keeps the air/fuel mixture cooler all the way to the cylinder heads. The open air space from the AirMax design separates the runners from the heat of the lifter-valley cover. The runners are tuned to move the power band 1,000 rpm higher over the original AirDuel manifolds to 1500-6500 rpm. Proflow's premium covers feature stout diecast aluminium construction with thick gasket rails to resist unwanted oil leaks. They're available in your black powder coat and have the Chevrolet name in white lasered on. Felpro Intake Gasket : Fel-1205 ARP Intake Bolt Kit : ARP-134-2001