STOCK AFR 1501 LS1 210cc Intake Enforcer As Cast Cylinder Head 66c Chambers. This product data sheet is originally written in English. AFR Direct Master Warehouse Distributor – All AFR Products Available. AFR LS1 210cc AFR As-Cast Enforcer Cylinder Head. AFR Part Number 1501. AFR’s 210 LS1 Enforcer Cylinder Head feature their Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your OEM engine operating below 6300 RPM. They come fully assembled with the identical components found in their higher end CNC ported cylinder head; such as PAC Racing springs, viton valve seals, machined bead valve locks (not stamped), hardened spring seats and ductile iron seats (not powdered metal) their one piece 8mm 21 4N Stainless Steel valves. They are available without any parts for the DIY. Please see footnotes for additional information. The all new LS1 210cc Enforcer Cylinder Head feature 2.020″ intake valves, 1.600″ exhaust valves and come assembled with their 8017 springs for hydraulic roller camshafts. Designed to work with the factory GM stand and rockers they will support up to a 0.600 lift camshaft and up to 6,500 RPM. Due to the large demand for AFR heads, AFR currently takes 4-6 weeks to build a set of heads. 210cc LS1 Street Head Flow Chart. Test conducted at 28″ of water (pressure) on Superflow 600 Bore Size: 4.060″, 3/4″ radius plate exhaust, 1 3/4″ curved pipe. As-Cast Combustion Chambers As-Cast Exhaust Ports As-Cast Intake Ports 3-angle Valve Job. 8mm Bead Lock Intake Valve, 2.020″ x 4.900″ Overall Valve Length. 8mm Bead Lock Exhaust Valve, 1.600″ x 4.900″ Overall Valve Length. PAC Racing Spring 1.290 OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat. 7° Chrome Moly Retainers 1.245 O. 7° Bead Lock Valve Keepers. Hardened Valve Spring O. D Locator 1.380 O. Specifications, Features, and Optional Supporting Components. 3.190″H x 1.015″W x5/16 top 3/8 bottom. 1.400″ H x 1.660″ W. Valve Cover Bolt Pattern. Valve Spring Pocket Diameter. Max Valve Spring Pocket Machining. 006 per cc 58cc Maximum. Head Bolt Washers, Manley. FAST 90mm, 92mm, or 102mm. Spark Plug Starting Range. Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match the AFR head. Warning:Do not machine spring pad any deeper. Note: Milling head deck will affect flow numbers. 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. TREperformance 1725 Monrovia Ave. Suite D7 Costa Mesa, CA 92627.