AFR’s 180cc “Street” heads are a cost effective performance choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for street, towing, or street/strip engines with displacements up to 383 cubic inches, operating up to 6000 RPM. Legal for 1994 and older emissions controlled vehicles under CARB EO #D-250-2. Component upgrade and machining options are available to customize AFR Heads to your specific build (see pg. 45). To ensure trouble free operation of AFR cylinder heads & parts please view the footnotes on pg. 50 for additional information.
Included Components | |
90% CNC Ported Combustion Chambers | |
100% CNC Ported Exhaust Ports | |
100% CNC Ported Intake Ports | |
Competition 5-Angle Valve Job |
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8mm Bead Lock Intake Valve, 2.020" x 4.900" Overall Valve Length | |
8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length | |
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 |
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7° Manley Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D | |
7° Bead Lock Valve Keepers | |
ARP 3/8" Rocker Studs | |
Adjustable 5/16" Guide Plates | |
Viton Valve Seals .600" O.D x .495" I.D | |
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep | |
Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep | |
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L |
180cc Street Head Flow Chart | ||||
.200 | .300 | .400 | .500 | |
Int | 138 | 198 | 240 | 260 |
Exh | 110 | 158 | 190 | 207 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
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