AFR 210cc LT4 SBC Racing Cylinder Head
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The Most Powerful Standard Racing Head Available
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reasonably priced AFR 210cc intake port small block Chevy angle
plug cylinder heads are available in two 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 combustion chambers and 80cc
exhaust ports with a 3/4” thick head deck (ideal for nitrous
or blower applications). Standard
valves are lightweight 8mm 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 aluminum cylinder
head for 350 to 400 cid engines in bracket drag cars, sportsman
oval trackers, and highly modified street class cars operating between
3000 and 7500 rpm (higher rpm ranges possible depending on combination
of parts).The 210cc heads are available in either standard or spread
port exhaust. Straight plug versions and down nozzle provisions
are special order only. No special parts are required (see footnotes here). Dual valve cover bolt pattern is standard.
Exhaust port is raised .250 over GM L98 cylinder heads.
Note:
These cylinder 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.
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210cc SBC Aluminum Cylinder Head Street Flow Chart |
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210cc SBC Aluminum Cylinder Head Comp. Flow Chart |
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210cc SBC Racing Cylinder Head Part Numbers
CNC Ported Pairs of Heads Complete With Parts or
Ready to Install
Race
Ready CNC Strip Ported Heads |
Description |
Part Number |
| 210cc Racing Head, LT4/LT1, Standard/Reverse Cooled, 55-65cc |
1057 |
Competition
Package CNC Ported Heads |
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Description |
Part Number |
| 210cc Racing Head, LT4 only, Standard/Reverse Cooled, 55-65cc |
1101 |
Stage
1 Bare Heads (no parts or porting) |
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Description |
Part Number |
| 210cc Racing Head, LT4, Reverse Cooled |
1173 |
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 |
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| Intake Valve, 2.080" x .100" long |
AFR #7255 |
| Exhaust Valve, 1.600" x .100" long |
AFR #7254 |
| 1.550" OD Roller dual valve spring w/ dampener, |
AFR #8000 |
| 225lbs on seat, .710" maximum lift (upgrades available) |
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| 10° 4140 Chrome Moly Retainers |
AFR #8511 |
| 10° Valve Locks |
AFR#9009 |
| 7/16" Rocker Studs |
AFR #6405 |
| 5/16" Guide Plates |
AFR#6110 |
| Valve Seals |
AFR #6612 |
| Hardened Shims |
AFR #8045 |
| Intake Valve Seats |
AFR #9060 |
| Exhaust Valve Seats |
AFR#9070 |
| Bronze Valve Guides |
AFR#9051 |
Special orders available on request.
| Specifications, Features, and Optional Supporting Components |
| Head Torque |
65-70 ft. lbs |
| Rocker Stud Torque |
55-60 ft. lbs |
| Intake Port Gasket, 1.310" X 2.180" w/ 3/8" radius |
AFR #6860 |
| Exhaust Port Gasket |
Fel-Pro #1405, AFR #6834 |
| Head Gasket |
350cid Fel-Pro #1074, AFR #6803 |
| Head Bolts & Studs |
Standard ARP, AFR #6310 & #6305 |
| Head Bolt Washers |
Manley, AFR #6320 |
| Stud Girdle GM L98 |
AFR #6200 |
| Suggested Manifold |
Edelbrock LT or GM LT |
| Spark Plug Starting Range |
Autolite 3910 |
| Combustion Chambers |
55cc or 65cc |
| Spring Pocket can be cut to 1.750, no deeper |
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| Valve Spacing |
Standard GM L98 |
| Rocker Arms |
Standard GM L98 |
| Valve Angle |
23° |
| Angle Mill (milling options available) |
.008" per cc |
| Flat Mill (milling options available) |
.006" per cc |
| Pushrods |
5/16" Hardened AFR #6601 - #6604 |
Important: Do not port match your intake manifold to this Fel-Pro gasket, as they do not exactly fit AFR heads.
Note: Milling head deck will affect flow numbers.
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