AFR 180cc LT1 SBC Eliminator Street Cylinder Head

The Small Port, High Velocity Torque Monster

AFR 180 SBC LT1 Cylinder Head The AFR Emissions Legal (CARB EO #D-250-2 for engines up to 1994), 180cc intake port LT1 small block Chevy cylinder heads are available in the LT1 angle plug version only. These heads feature a 56cc to 74cc 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 idle to 6000 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 and is specifically designed for 1992-95 Corvettes and 1993-97 Camaros. No special parts are required. Dual valve cover bolt pattern is standard.

Note:

Hydraulic roller cams typically experience valve float at 5800-6000 rpm because of their fast ramp rates. AFR suggest you upgrade your springs to AFR part #8032, 1.530 O.D. with higher spring pressures and use our Patented “Hydra Rev Kit” to reduce chances of valve float associated with rpm 6000 or higher.

180cc SBC LT1 Street Head Part Numbers

CNC Ported Pairs of Cylinder Heads Complete With Parts and Ready to Install

CNC Street Ported Heads
Description	Part Number
180cc LT1 Street Heads, Angle Plug, 56cc-74cc	0908*
Competition Package CNC Ported Heads
Description	Part Number
180cc Street Heads, Angle Plug, 56cc-74cc	0909*

Stage 1 Bare Heads (no parts or porting) are available.

*Only models with heat riser (marked by an asterisk)
are emissions legal, all others are not legal for sale or use on
pollution controlled motor vehicles in the United States.

Basic Package Components	Part #
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 #7006
Exhaust Valve, 1.600" standard length	AFR #7219
	Comp Pkg #7056
1.450" OD Hydraulic dual valve spring w/ dampener, 120lbs on seat, .550" maximum lift	AFR #8020
(upgrades available)	Comp Pkg #8015
10° Titanium Retainers	AFR #8506
10° Valve Locks	AFR#9005
	Comp Pkg #8505
3/8" Rocker Studs (if using non-self aligning rockers)	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! Special orders available upon request.

Specifications, Features, and Supporting Components

Head Torque	65-70 ft. lbs
Rocker Stud Torque	55-60 ft. lbs
Intake Port Gasket	GM LT1
Exhaust Port Gasket	Fel-Pro #1404, AFR #6834
Head Gasket	350cid Fel-Pro #1003, AFR #6800
Head Bolts & Studs	Standard ARP, AFR #6310 & #6305
Head Bolt Washers	Manley, AFR #6320
Stud Girdle	AFR #6201
Suggested Manifold	GM LT1
Spark Plug Starting Range	AC FR3LS
Combustion Chambers	56cc to 74cc
Spring Pocket can be cut to 1.625, no deeper
Valve Spacing	Standard
Rocker Arms	Standard
Valve Angle	23°
Angle Mill (milling available)	.008" per cc
Flat Mill (milling available)	.006" per cc
Pushrods	5/16" Hardened AFR #6606

Note: Milling head deck will affect flow numbers.




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AFR 180cc LT1 SBC Eliminator Street Cylinder Head

The Small Port, High Velocity Torque Monster

Note:

180cc SBC LT1 Street Head Part Numbers

CNC Ported Pairs of Cylinder Heads Complete With Parts and Ready to Install

CNC Street Ported Heads

Description

Part Number

Competition Package CNC Ported Heads

Description

Part Number

Stage 1 Bare Heads (no parts or porting) are available.