190cc SBC "Eliminator" Vortec 23° Street Head

The Small Port, High Velocity Torque Monster

The AFR Vortec Emissions Legal (CARB EO #D-250-2), 190cc intake port small block Chevy cylinder heads are available in a straight plug version. They feature a 65cc combustion chamber with a 64cc exhaust port and 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 idle to 5500rpm (higher rpm ranges possible depending on combination of parts), 23° valve angle, and standard valve spacing make this the perfect street head for 350cid engines from 1996-2000. Center bolt valve cover is available as a machine option. Exhaust port and bolt pattern are raised 3/32" over GM L98 Heads, this rarely affects header or chassis fitment. No special parts are required (see footnotes here).


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.

190cc Vortec Street Head Flow Chart

Tested on 4.060 Bore

Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
AFR #7251 Bead Lock Intake Valve, 2.020" 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 (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
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 Vortec Intake Port Gasket
Important: Do not port match your intake manifold to GM gasket as it does not precisely fit AFR heads.
AFR #6834 Exhaust Port Gasket, Fel-Pro #1404
AFR #6800 Head Gasket, 350cid Fel-Pro #1003
AFR #6802 Head Gasket, 400cid Fel-Pro #1014
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 Vortec or Edelbrock Suggested Manifold
AC FR3LS or 41629 Spark Plug Starting Range
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)

Note: Flat & angle mills might require .120 thick intake gasket.

 Model      Product Name   Price   Buy Now 
 912   SBC 190cc Street Vortec Heads, straight plug, 65cc, complete w/parts   SBC 190cc Street Vortec Heads, straight plug, 65cc, complete w/parts   $1,695.00  Buy Now 
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