AFR - Airflow Research 1031 - AFR SB-Chevy LT4 Aluminum Cylinder Heads
AFR - Airflow Research #033-1031SB-Chevy LT4 Street Cylinder Head |
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AFR - Airflow Research 1031 - AFR SB-Chevy LT4 Aluminum Cylinder Heads Details
LT4 Street Aluminum Cylinder Heads
195cc Intake Ports, 58cc Combustion Chambers
SB Chevy LT4 Basic Package Components 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports 3-angle Valve Job Intake Valve, 2.020'' standard length Exhaust Valve, 1.600'' standard length 1.290'' OD Hydraulic Dual Valve Spring, 120 lbs. on seat, .550'' maximum lift 10º 4140 Chrome Moly Retainers 10º Valve Locks 3/8'' Rocker Studs Guide Plates Valve Seals Hardened Shims Intake Valve Seats Exhaust Valve Seats Bronze Valve Guides SB Chevy LT4 Street Head Specifications Head Torque 65-70 Ft. Lbs. Rocker Stud Torque 55-60 Ft. Lbs. Intake Port Gasket 1.250'' x 2.100'' w/ 3/8'' radius Important: Do not port match your intake manifold to this Fel-Pro gasket, as they do not exactly fit AFR heads. Exhaust Port Gasket Fel Pro 375-1404 Head Gasket 350 cid Fel Pro 375-1074 Head Bolts & Studs Standard Head Bolt Washers Manley Standard Suggested Manifold GM LT4 Spark Plug Starting Range AC FR3LS Combustion Chambers 58cc to 74cc Spring Pocket can be cut to 1.625, no deeper. Valve Spacing Standard Rocker Arms Standard Valve Angle 23º Angle Mill .008'' per cc Flat Mill .006'' per cc Pushrods 5/16'' Hardened
All Accessory Holes are Predrilled & Tapped!
AFR's 195cc SBC LT4 Street Cylinder Head
The Ultimate Bolt-on Emissions Legal Street Weapon
The Airflow Research Emissions Legal, 195cc intake port LT4 small block Chevy cylinder heads are available in an LT4 angle plug version. These heads feature a 58cc combustion chamber with a 64cc exhaust port and a 3/4'' thick head deck (ideal for nitrous or blower applications). Standard valves are 2.020 intake and 1.600 exhaust with AFR’s hardened ductile iron interlocking valve seats. The exceptional flow characteristics, ideal operating range of 2500 rpm to 6500 rpm (higher rpm ranges possible depending on combination of parts), 23º valve angle, and standard valve spacing make this the perfect street head for 350 cid to 383 cid engines. Designed specifically for 1996 Corvettes or LT4 manifold users. No special parts are required. AFR 210cc SBC LT4 Racing Cylinder Head
These reasonably priced AFR 210cc intake port small block Chevy angle plug cylinder heads come fully CNC ported with 64cc combustion chambers and 80cc exhaust ports and a 3/4'' thick head deck (ideal for nitrous or blower applications). Standard valves are 2.080 intake and 1.600 exhaust with AFR’s hardened ductile iron interlocking valve seats. The exceptional flow characteristics, 23º valve angle, and standard valve spacing make this the perfect head for 350 to 400 cid engines in bracket drag cars, sportsman oval trackers, and highly modified street class cars operating between 3000 and 7500 rpm (higher rpm ranges possible depending on combination of parts).The 210cc heads are available in either standard or spread port exhaust. No special parts are required.
