AFR 23° SBC 190cc Vortec Cylinder Head

AFR's 190cc Vortec Street heads are the preferred choice over reworked factory heads. Featuring 100% CNC ported intake, exhaust, and combustion chambers, these cylinder heads are designed with high-quality A356 aluminum castings and premium components. Perfect for street, towing, or street/strip engines ranging from 350-383 cubic inches, operating up to 6000 RPM. *Not compatible with self-aligning rocker arms.*

Included Components

100% CNC Ported Combustion Chambers
90% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-angle Valve Job
8mm Bead Lock Intake Valve, 2.020" x 4.900" Overall Valve Length - AFR #7251
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length - AFR #7250
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring - AFR #8017
7° Chrome Moly Retainers - AFR #8514
7° Bead Lock Valve Keepers - AFR #9007
ARP 3/8" Rocker Studs - AFR #6409
Adjustable 5/16" Guide Plates - AFR #6103
Viton Valve Seals - AFR #6612
Hardened Valve Spring O.D Locator - AFR #8042
Ductile Iron Intake Valve Seats - AFR #9060
Ductile Iron Exhaust Valve Seats - AFR #9070
8mm Bronze Valve Guides - AFR #9051

Performance Flow Chart

*Test conducted at 28" of water (pressure) on Superflow 1020 Bore Size: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe.*

Lift	.200	.300	.400	.500	.550
Intake	135	213	253	276	279
Exhaust	110	158	190	207	211

Specifications & Features

Material: A356 Aluminum
Intake Port Volume: 190cc
Exhaust Port Volume: 64cc
Combustion Chamber Size: 65cc
Valve Angle: 23°
Deck Thickness: .750"
Minimum Bore Diameter: 4.000"
Flat Mill: .006" per cc (60cc Maximum)
Angle Mill: .009" per cc (55cc Maximum)
Spark Plug Dimensions: 14mm x .750" w/Gasket Seat

Legal Disclaimer

CARB Status: These products are illegal to operate on any public highway, including any paved or unpaved roadway or public park. They are only legal for use on dedicated racing vehicles. Violation of this regulation may result in penalties up to $37,500 per violation per vehicle, revocation of registration by the DMV, loss of use on public right-of-ways, and proof of correction of the tampering.