195cc LT1/LT4 "Eliminator" 23° Street Head

The Ultimate Bolt-on Emissions Legal Street Weapon

The 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), 23° 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. Center bolt valve cover is available as a machine option. Exhaust port and bolt pattern are raised 3/32" over GM L98 cylinder heads, this rarely affects header or chassis fitment. No special parts are required (see footnotes here).

Note:

Hydraulic roller cams typically experience valve float at 6200-6400 rpm because of their fast ramp rates. AFR suggests you upgrade your springs to AFR part #8605, with higher spring pressures to reduce chances of valve float associated with rpm 6200 or higher.

195cc SBC LT4 Aluminum Cylinder Head Street Flow Chart

Tested on 4.060 Bore

AFR 195cc SBC Cylinder Head Flow Chart

195cc SBC LT4 Aluminum Cylinder Head Competition Flow Chart

Tested on 4.060 Bore

AFR 195cc SBC Cylinder Head Flow Chart


Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
AFR #7252 Bead Lock Intake Valve, 2.050" x 4.903" Overall Valve Length
Comp Pkg #7259 Bead Lock Intake Valve, 2.080" x 4.903" Overall Valve Length
AFR #7250 Bead Lock Exhaust Valve, 1.600" x 4.955" Overall Valve Length
AFR #8017 PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring,
140 lbs on seat, .600" maximum lift, Max RPM 6300-6800
AFR #8019 PAC Racing Spring 1.270" OD Hydraulic Dual Valve Spring,
155 lbs. on seat, .650" maximum lift, Max RPM 7000-7200 (standard on competition head)
AFR #8514 Manley 7° Chrome Moly Retainers
AFR #9007 7° Bead Lock Valve Keepers
AFR #6410 3/8" Rocker Studs
AFR #6103 Adjustable 5/16" Guide Plates (If using non-self aligning rockers)
AFR #6612 Viton Valve Seals
AFR #8042 Hardened Spring Cup
AFR #9060 Intake Valve Seats
AFR #9070 Exhaust Valve Seats
AFR #9051 Bronze Valve Guides



Specifications, Features, and Optional Supporting Components
65-70 ft. lbs Head Torque w/ Moly Lube
55 ft. lbs Rocker Stud Torque
GM LT4 #12528884 Intake Port Gasket, 195cc Street
AFR #6860 Intake Port Gasket, 195cc Competition Package
Important:Do not port match your intake manifold to GM LT4 Gaskets as it does not precisely fit AFR heads. Don't use GM #12367777.
AFR #6834 Exhaust Port Gasket, Fel-Pro #1404
AFR #6803 Head Gasket, 350cid Fel-Pro #1074
AFR #6310 SB Chevy Head Bolt Kit, ARP #134-3701
AFR #6305 SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301
AFR #6320 Head Bolt Washers, Manley
AFR #6200 Stud Girdle GM L98
GM LT4 Suggested Manifold
AC FR3LS or 41629 Spark Plug Starting Range
55cc to 65cc Combustion Chambers
Can be cut to 1.625, no deeper Spring Pocket
Standard GM L98 Valve Spacing
Standard, GM L98 Rocker Arms
23° Valve Angle
.008" per cc Angle Mill (Milling options available)
.006" per cc Flat Mill (Milling options available)
 Model      Product Name   Price   Buy Now 
 1031*   SBC 195cc LT4 Reverse Cool Heads, (Specify chamber size 55cc - 65cc) L98 angle plug, complete w/parts   SBC 195cc LT4 Reverse Cool Heads, (Specify chamber size 55cc - 65cc) L98 angle plug, complete w/parts   $1,940.00  Buy Now 
 1039   AFR SBC 195cc LT4 Reverse Cool Competition Package Heads, (Specify chamber size 55cc - 65cc) L98 angle plug, complete w/parts   AFR SBC 195cc LT4 Reverse Cool Competition Package Heads, (Specify chamber size 55cc - 65cc) L98 angle plug, complete w/parts   $2,533.00  Buy Now 
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Air Flow Research | 28611 W. Industry Drive | Valencia, CA 91355 | 661-257-8124

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