CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
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. To ensure trouble free operation of AFR cylinder heads & parts please view the footnotes on pg. 50 for additional information.
| 180cc Aluminum SBC Cylinder Heads | ||
|---|---|---|
| Part # | Plug Type | Combustion Chamber |
| 0908 | GM LT1 | 65cc |
| 0909 | GM LT1 | 54cc |
| 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 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% 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 |
7251
|
| 8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length |
7250
|
| PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 |
8017
|
| 7° Manley Chrome Moly Retainers 1.245" O.D x .885" I.D x .655" I.D |
8514
|
| 7° Bead Lock Valve Keepers |
9007
|
| ARP 3/8" Rocker Studs |
6409
|
| Adjustable 5/16" Guide Plates |
6103
|
| Viton Valve Seals .600" O.D x .495" I.D |
6612
|
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D |
8042
|
| Ductile Iron Intake Valve Seats 2.200" O.D x 1.750" I.D x .375" Deep |
9060
|
| Ductile Iron Exhaust Valve Seats 1.696" O.D x 1.325" I.D x .305" Deep |
9070
|
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L |
9051
|
| Recommended Components: | |
| Intake Gasket |
GM #12524653 LT1 or Fel-Pro #1284
|
| Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads. | |
| Exhaust Port Gasket, Fel-Pro #1404 |
6834
|
| Head Gasket, 350cid Fel-Pro #1003 |
6803
|
| SB Chevy Head Bolt Kit, ARP #134-3701 |
6310
|
| SB Chevy Head Stud Kit, 12 Point Nuts, ARP #234-4301 |
6305
|
| Head Bolt Washers, Manley |
6320
|
| AFR Stud Girdle |
6200
|
| Suggested Manifold |
GM LT1 or LT4
|
| Spark Plug Starting Range |
Autolite 3924
|
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
180cc
|
| Intake Port Dimension |
2.050" H x 1.250" W x 5/16° Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
64cc
|
| Exhaust Port Dimension |
1.450" H x 1.550" W
|
| Exhaust Port Location |
.100" Raised
|
| Combustion Chamber Size |
65cc or 75cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
23°
|
| Valve Spring Pocket Diameter |
1.460" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Warning: Do not machine spring pad any deeper. | |
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 60cc Maximum
|
| Angle Mill |
.009" per cc 55cc Maximum
|
| Note: Angle mills might require .120 thick intake gasket. | |
| Minimum Cross Sectional Area |
1.810 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| Carb EO# |
D-250-2
|
SHIPS IN THE LOWER 48 STATES FREE!
CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
CONTACT US THE PRICE IS NEGOTIABLE BEST OFFER
Warning: May cause cancer and reproductive harm.
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