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AFR 220cc SBC LT4 Aluminum Cylinder Heads
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The Most Popular Racing Head Ever
The powerful AFR 220cc intake port small block Chevy angle plug cylinder heads
are available in three stages of performance. The Race Ready version features
100% CNC ported intakes while the higher flowing Competition version features
100% CNC ported intakes with greater detail. Both come with
100% CNC ported 76cc combustion chambers and 80cc exhaust ports with
a 3/4” thick head deck (ideal for nitrous or blower applications).
In addition we also offer the “as cast” Stage 1 heads for 220cc performance on a budget.
Standard valves are 2.080 intake and 1.600 exhaust with AFR’s hardened
ductile iron interlocking valve seats. The exceptional flow characteristics,
23º valve angle, and standard valve spacing make this the perfect head for
350 to 434 cid engines in drag cars, sprint cars, and late model oval trackers
operating between 4500 and 8500 rpm. The 220cc heads are available in either
standard or spread port exhaust. Straight plug versions and down nozzle provisions
are special order only. AFR offset stud girdles are the only special parts required.
Some applications require shaft mount rockers for durability and reliability of
valve train components. Not recomended for street use, unless shaft mount rocker is used.
Note:
These heads are specifically design for 1992-95 Corvettes and 1993-97 Camaros LT-1 and LT-4
engines using the GM LT-4 or equivalent manifold.
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 |
| 220cc LT4 CNC Ported w/parts L98 Angle Plug 58cc-76cc |
1066 |
$2009 |
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| 220cc LT4 Competition Package w/parts L98 Angle Plug 58cc-76cc |
1127 |
$2575 |
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| 220cc LT4 BARE HEADS NO PARTS L98 Angle Plug 70cc |
1177 |
$1009 |
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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
Competition 3-angle Valve Job
Intake Valve, 2.080" x .050" long, AFR #7018
Exhaust Valve, 1.600" x .050" long, AFR #7057
1.550" OD Roller Valve Spring, 220 lbs. on seat, .670" maximum lift, AFR #8000
10º Titanium Retainers, AFR #8505
10º Valve Locks, AFR #9005
7/16" Rocker Studs, AFR #6405
5/16" Guide Plates, AFR #6105
Valve Seals, AFR #6611
Hardened Shims, AFR #8045
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, GM LT-4
Exhaust Port Gasket Fel Pro #1406, AFR #6835
Important: Do not port match your intake manifold to this Fel-Pro gasket, as they do not exactly fit AFR heads.
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 #6206
Suggested Manifold Victor Jr or Super Victor, AFR #5005 & #5003
Spark Plug Starting Range Autolite 3910
Combustion Chambers 76cc
Spring Pocket can be cut to 1.575, no deeper.
Valve Spacing Standard
Rocker Arms Standard
Valve Angle 23º
Angle Mill (milling available) .008” per cc
Flat Mill (milling available) .006” per cc
Pushrods 5/16” Hardened, AFR #6601 thru #6604
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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