AFR 195cc SBC LT4 Eliminator Street Cylinder Head
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The Ultimate Bolt-on Emissions Legal Street Weapon
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AFR Emissions Legal (CARB EO #D-250-2 for engines up to 1994), 195cc
intake port LT4 small block Chevy aluminum cylinder heads are available in
an LT4 angle plug version. These heads feature a 55cc to 65cc combustion
chamber with a 64cc exhaust port and a 3/4” thick head deck
(ideal for nitrous or blower applications). Standard valves are lightweight 8mm
2.020 intake and 1.600 exhaust with AFR’s hardened ductile
iron interlocking valve seats. The exceptional flow characteristics,
ideal operating range of 2500 rpm to 6500 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. Designed specifically for 1996 Corvettes
or LT4 manifold users. No special parts are required (see footnotes here). Dual valve cover bolt pattern is standard. Exhaust port is raised .100 over GM L98 cylinder heads.
Note:
Hydraulic roller cams typically experience valve float at 6000-6200
rpm because of their fast ramp rates. AFR suggest you upgrade your
springs to AFR part #8047, 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. |
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195cc SBC Aluminum Cylinder Head Street Flow Chart |
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195cc SBC Aluminum Cylinder Head Comp. Flow Chart |
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195cc SBC LT4 Street Cylinder Head Part Numbers
CNC Ported Pairs of Heads Complete With Parts and
Ready to Install
CNC Street Ported Heads
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Description
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Part Number
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| 195cc LT4 Street Heads, Angle Plug, 55cc-65cc |
1031 |
Competition Package CNC Ported Heads
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Description
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Part Number
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| 195cc LT4 Street Heads, Angle Plug, 55cc-65cc |
1039 |
Stage 1 Bare Heads (no parts or porting) are available.
| 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, 2.050" standard length |
AFR #7252 |
| Intake Valve, 2.080" standard length |
Comp Pkg #7259 |
| Exhaust Valve, 1.600" standard length |
AFR #7250 |
| 1.290" OD Hydraulic dual valve spring w/ dampener, |
AFR #8017 |
| 130lbs on seat, .600" maximum lift (upgrades available) |
Comp Pkg #8019 |
| 7° Titanium |
AFR #8515 |
| 7° Valve Locks |
AFR#9007 |
| 3/8" Rocker Studs |
AFR #6410 |
| Guide Plates (if using non-self aligning rockers) |
AFR#6110 |
| Valve Seals |
AFR #6612 |
| Hardened Shims |
AFR #8042 |
| Intake Valve Seats |
AFR #9060 |
| Exhaust Valve Seats |
AFR#9070 |
| Bronze Valve Guides |
AFR#9051 |
| Specifications, Features, and Optional Supporting Components |
| Head Torque |
65-70 ft. lbs |
| Rocker Stud Torque |
55-60 ft. lbs |
| Intake Port Gasket |
195 Comp Pkg AFR #6860 |
| Intake Port Gasket |
195 Street GM #12528884 LT4 |
| Exhaust Port Gasket |
Fel-Pro #1404, 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 |
GM LT4 |
| Spark Plug Starting Range |
AC FR3LS or 41629 |
| Combustion Chambers |
55cc to 65cc |
| Spring Pocket can be cut to 1.625, no deeper |
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| 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 |
Important: Do not port match you intake manifold to GM LT-4 gasket as it does not precisely fit AFR heads. Do not use GM #12367777.
Note: Milling head deck will affect flow numbers.
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