180cc LT1 "Eliminator" 23° Street Head

The Small Port, High Velocity Torque Monster

AFR`s LT1/LT4 heads are designed for the Gen II reverse cooled SBC engine from 1992-1996. They feature all the same benefits and quality components as AFR`s Gen I SBC Heads in addition to dual pattern valve cover mounting holes and Titanium Retainers as standard equipment. Not compatible with self-aligning rocker arms. Component upgrade and machining options are available to customize AFR Heads to your specific build here.

180cc SBC LT Street Aluminum Cylinder Head Flow Chart

Tested on 4.060 Bore

AFR 180cc SBC LT Cylinder Head Flow Chart
Included Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-Angle Valve Job
AFR #7251 8mm Bead Lock Intake Valve, 2.020" x 4.900" Overall Valve Length
AFR #7250 8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length
AFR #8017 PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring,
140 lbs on seat, .600" maximum lift, Max RPM 6300-6800
AFR #8514 Manley 7° Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D
AFR #9007 7° Bead Lock Valve Keepers
AFR #6409 ARP 3/8" Rocker Studs
AFR #6103 Adjustable 5/16" Guide Plates
AFR #6612 Viton Valve Seals .600" O.D x .495" I.D
AFR #8042 Hardened Spring Cup O.D Locator 1.380" O.D x .570" I.D
AFR #9060 Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" O.D x .375" Deep
AFR #9070 Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep
AFR #9051 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L

Specifications & Features:
A356 Aluminum Material
180cc Intake Port Volume
2.050" H x 1.250" W 5/16 Radius Intake Port Dimension
Stock Intake Port Location
64cc Exhaust Port Volume
1.450" H x 1.550" W Exhaust Port Dimension
.100" Raised Exhaust Port Location
55cc or 65cc Combustion Chamber Size
Center and Perimeter Bolt Valve Cover Bolt Pattern
23° Valve Angle
1.460" O.D Valve Spring Pocket Diameter
1.750" O.D Max Valve Spring Pocket Machining
Warning: Do not machine spring pad any deeper.
.750" Deck Thickness
4.000" Minimum Bore Diameter
.006" per cc 60cc Maximum Flat Mill
.009" per cc 55cc Maximum Angle Mill
1.810 sq. in. Minimum Cross Sectional Area
14mm x .750" w/Gasket Seat Spark Plug Dimensions
D-250-2 Carb EO#

Note: Angle mills might require .120" Thick intake gasket.

Recommended Components:
GM #12524653 LT1 / Fel-Pro #1284 Intake Port Gasket
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
AFR #6834 Exhaust Port Gasket, Fel-Pro #1404
AFR #6803 Head Gasket, 350cid Fel-Pro #1074
AFR #6310 SB Chevy Head Bolt Kit, ARP #134-3701
AFR #6305 SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301
AFR #6320 Head Bolt Washers, Manley
AFR #6200 Stud Girdle GM L98
GM LT1 or LT4 Suggested Manifold
Autolite 3924 Spark Plug Starting Range

 Model      Product Name   Price   Buy Now 
 0908*   SBC 180cc LT1 Reverse Cool Heads, (Specify chamber size 55cc - 65cc) L98 angle plug, complete w/parts   SBC 180cc LT1 Reverse Cool Heads, (Specify chamber size 55cc - 65cc) L98 angle plug, complete w/parts   $1,965.00  Buy Now 
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