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AFR 180cc SBC LT1 Aluminum Cylinder Heads
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The Small Port, High Velocity Torque Monster
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.
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.
FREE Shipping on ALL AFR Heads!!!
All AFR Chevy LT1/LT4 Heads not "In Stock" are made to order (12 WEEK BUILD TIME) and are ordered after payment is received. Contact us to see if the heads you want are in stock.
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| Kit Description |
Part Number |
Price |
Buy |
| 180cc LT1 CNC Ported w/parts L98 Angle Plug 56cc-74cc |
0908 |
$1775 |
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| 180cc LT1 Competition Package w/parts L98 Angle Plug 56cc-74cc |
0909 |
$2450 |
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Intake Ports:
Flow Charts:
Combustion Chamber:
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Exhaust Ports:
Basic Package Components:
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
70% to 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
1.450" OD Hydraulic Dual Valve Spring, 120 lbs. on seat, .550" maximum lift, AFR #8020 Comp PKG #8015
10º Titanium Retainers, AFR #8506
10º Valve Locks, AFR #9006
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, 1.250” x 2.040” with 3/8” radius, AFR #6827
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 #1404, AFR #6834
Head Gasket 350 cid Fel Pro #1074, AFR #6803
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 23º
Angle Mill .008” per cc
Flat Mill .006” per cc
Pushrods 5/16” Hardened AFR #6606
Note: Milling head deck will affect flow numbers
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View the rest of our catalog:
Full Catalog
Please contact us with any questions:
2587 Dos Lomas
Fallbrook, Ca 92028
(760) 586-5617
Email: sales@TREperformance.com
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