TREPerformance

The Small Port, High Velocity Torque Monster The AFR Emissions Legal (versions from 1969-94 with heat riser, CARB EO #D-250-2), 180cc intake port small block Chevy cylinder heads are available in your choice of straight, or L98 angle plug versions. These heads feature a 75cc or 65cc combustion chamber with a 64cc exhaust port and a 3/4 inch thick head deck (ideal for nitrous or blower applications.) The 65cc chambers are designed for flat top or dished pistons; domed pistons will require additional machining. 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 idle to 5500 rpm (higher rpm ranges possible depending on combination of parts), 23 degree valve angle, and standard valve spacing make this the perfect street head for 327 cid to 350 cid engines from 1955-86. Also available for 1987 to present engines with center bolt valve covers and 2 center intake bolts at 72 degree angle. No special parts are required. Vortec style head available too.

Note: The new AFR 180cc and 195cc SBC heads now use the LS1 springs which are good for .600" lift.

FREE Shipping on ALL AFR Heads!!!

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, AFR #7204 Comp PKG #7002 Exhaust Valve, 1.600" standard length, AFR #7219 Comp PKG #7057 1.290" O.D. Dual Hydraulic Valve Spring, 135 lbs. on seat, .600� maximum lift #8017, Comp PKG #8015 10" 4140 Chrome Moly Retainers, AFR #8510 10" Valve Locks, AFR #9005 3/8" Rocker Studs, AFR #6410 Guide Plates, AFR #6105 Valve Seals, AFR #6611 Hardened Shims, AFR #8043 Intake Valve Seats, AFR #9060 Exhaust Valve Seats, AFR #9070 Bronze Valve Guides, AFR #9050

All Accessory Holes are Predrilled & Tapped!

Specifications, Features, and Supporting Components:

Head Torque 65-70 Ft. Lbs. Rocker Stud Torque 55-60 Ft. Lbs. Intake Port Gasket, 1.230”x1.990” w/ 3/8” Radius, AFR #6815 Important: Do not port match you intake manifold to this Fel-Pro gasket, as they do not exactly fit AFR heads. Exhaust Port Gasket Fel Pro #1404, AFR #6834 Head Gasket 350cid Fel Pro #1003, AFR #6800 400cid Fel Pro #1014, AFR #6802 Head Bolts & Studs Standard ARP, AFR #6310 & #6305 Head Bolt Washers Manley, AFR #6320 Stud Girdle AFR #6201 Suggested Manifold Edelbrock #3701, AFR #5029 Spark Plug Starting Range AC FR3LS Combustion Chambers 74cc or 68cc Spring Pocket can be cut to 1.625, no deeper. Valve Spacing Standard Rocker Arms Standard Valve Angle 23 degree Angle Mill (milling available) .008” per cc Flat Mill (milling available) .006” per cc Pushrods 5/16 inch Hardened AFR #6600 & #6601

Note: Milling head deck will affect flow numbers