AFR 180cc LT1 Eliminator SBC Aluminum Cylinder Heads
The Small Port, High Velocity Torque Monster!
The AFR Emissions Legal (ARB only, 49 state legal, not California), 180cc intake port LT1 Small Block Chevy cylinder heads are available in the LT1 angle plug version only. These heads feature a 55cc to 65cc combustion chamber with a 64cc exhaust port and a 3/4" thick head deck (ideal for nitrous or blower applications). Standard valves are lightweight 8mm 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 6000 rpm (higher rpm ranges possible depending on combination of parts), 23° valve angle, and standard valve spacing make this the perfect street cylinder head for 350 cid to 383 cid performance engines and is specifically designed for 1992-1995 Corvettes and 1993-1997 Camaro's. No special parts are required. Dual valve cover bolt pattern is standard.
Exhaust port is raised .100 over GM L98 cylinder heads.
Note: Angle mills might require .120" Thick intake gasket.
|Basic Package Components||Part #|
|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, 2.020" x 4.900" Overall Valve Length||AFR #7251|
|8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length||AFR #7250|
|PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring,
140 lbs on seat, .600" maximum lift, Max RPM 6300-6800
|7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D.||AFR #8515|
|7° Bead Lock Valve Keepers||AFR #9007|
|ARP 3/8" Rocker Studs||AFR #6409|
|Adjustable 5/16" Guide Plates||AFR #6103|
|Viton Valve Seals .600" O.D x .495" I.D||AFR #6612|
|Hardened Spring Cup O.D Locator 1.380" O.D x .570" I.D||AFR #8042|
|Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" O.D x .375" Deep||AFR #9060|
|Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep||AFR #9070|
|8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L||AFR #9051|
|Specifications, Features, and Optional Supporting Components|
|Head Torque||65-70 ft. lbs|
Intake Port Volume
|Intake Port Dimension||2.050" H x 1.250" W 5/16 Radius|
|Intake Port Location||Stock|
|Exhaust Port Volume||64cc|
|Exhaust Port Dimension||1.450" H x 1.550" W|
|Exhaust Port Location||.100" Raised|
Combustion Chamber Size
|55cc or 65cc|
|Valve Cover Bolt Pattern||
Center and Perimeter Bolt
|Valve Spring Pocket Diameter||1.460" O.D|
|Max Valve Spring Pocket Machining||1.750" O.D|
|Minimum Bore Diameter||
|Flat Mill||.006" per cc 60cc Maximum|
|Angle Mill||.009" per cc 55cc Maximum|
|Minimum Cross Sectional Area||1.810 sq. in.|
|Spark Plug Dimensions||14mm x .750" w/Gasket Seat|
|Intake Port Gasket||GM #12524653 LT1 / Fel-Pro #1284|
|Exhaust Port Gasket, Fel-Pro #1404||AFR #6834
|Head Gasket, 350cid Fel-Pro #1074||
|SB Chevy Head Bolt Kit, ARP #134-3701||
|SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301||AFR #6305
|Head Bolt Washers, Manley||
ARP #234-4301 AFR #6320
|Stud Girdle GM L98||
Fel-Pro #1074, AFR #6200
|Suggested Manifold||GM LT1 or LT4|
|Spark Plug Starting Range||
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. Angle mills might require .120" Thick intake gasket.
- Item Requires Shipping
- 65.0 lbs.
- W12.0000” x H12.0000” x L24.0000”
- Free Basic Shipping
- This item ships in its own box.
- FREE continental USA ground shipping on ALL AFR Cylinder Heads
- TRE Performance Difference
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