Timeless Design - The original AFR 60/40 Valve Spacing Head! High flowing AFR 227cc intake port small block Chevy angle plug aluminum cylinder heads are available in three stages of performance. The Race Ready version features 100% CNC ported intakes while the higher flowing Competition Package features 100% CNC ported intakes with greater detail. Both come with 100% CNC ported 65cc or 75cc combustion chambers and 80cc exhaust ports with a 3/4 thick head deck (ideal for nitrous or blower applications). In addition AFR also offers the "as cast" Stage 1 heads for 227cc performance on a budget.Standard valves are lightweight 8mm 2.100" intake and 1.600" exhaust with AFR's hardened ductile iron interlocking valve seats. The 227 has 60/40 valve spacing and piston valve pockets should be checked. The exceptional flow characteristics and 23 degree valve angle make this the perfect head for 350 to 434 cid engines in drag cars, sprint cars, and late model oval trackers operating from 4500 rpm and up.
The 227cc aluminum cylinder heads are available in either standard or spread port exhaust. AFR offset stud girdles are the only special parts required. Some applications require shaft mount rockers or. 050 offset rocker arms for durability and reliability of valve train components. Standard rockers can be used but the intake rocker arm will be at a slight angle and the roller tip will not be perfectly centered on the valve tip.
Not recommended for street use, unless a shaft mount rocker system is used. Dual valve cover bolt pattern is standard. The exhaust ports are raised. 250 over a standard GM L-98 cylinder head.
Note: 2.100 valves will require aftermarket pistons notched for valve clearance. 710 lift AFR# 1068 - 227cc Heads, Angle Plug, Standard Exhaust, 65cc. 710 lift AFR# 1074 - 227cc Heads, Angle Plug, Spread Port Exhaust, 65cc. 710 lift Note: 2.100 valves will require aftermarket pistons notched for valve clearance.Due to the large demand for AFR heads, AFR currently takes 3-4 weeks to build a set of heads. 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-angle Valve Job. 8mm Bead Lock Intake Valve, 2.100" x 5.000" Overall Valve Length. 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length. PAC Racing Spring 1.550 OD Solid Roller Dual Valve Spring, 220 lbs on seat.
Manley 10° Steel Retainers 1.500 O. D x 1.120 I. 10° Bead Lock Valve Keepers with lashcap recess. D Locator 1.550 O.Ductile Iron Intake Valve Seats 2.200 O. D x 1.750 I. Ductile Iron Exhaust Valve Seats 1.696 O. D x 1.325 I.
Specifications, Features, and Optional Supporting Components. 2.200" H x 1.290" W 5/16 Radius.
1.430" H x 1.540" W. Max Valve Spring Pocket Machining. 006 per cc 60cc Maximum. 009 per cc 55cc Maximum. Note: Angle mills might require a.
Shaft Mount Rocker Arms, T&D. Stud Mount Rocker Arms, Hardland Sharp. Intake Gasket 1.280x2.090 w/ 3/8 radius, Fel-Pro #1206. Exhaust Port Gasket, Fel-Pro #1405. Head Gasket, 350cid Fel-Pro #1003.Head Gasket, 400cid Fel-Pro #1014. Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads.
Note: Milling head deck will affect flow numbers. We have AFR heads to fit almost every performance application! - UPS Worldwide Expedited - 3-9 days GUARANTEED! Com) - UPS Worldwide Saver - 1-5 days GUARANTEED! We do not lower invoice values since it is a violation of US and International custom laws.Let us work to resolve your problem so everyone is happy. Suite D7 Costa Mesa, CA 92627. The item "AFR SBC 227cc Aluminum Cylinder Heads 400 434 CNC Ported Small Block Chevy 1067" is in sale since Wednesday, March 9, 2011. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "treperformance" and is located in Costa Mesa, California. This item can be shipped worldwide.