AFR Cylinder Heads

Custom Piston Worksheet & Order Form (pdf)

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AFR Cylinder Heads_Chevrolet Small Block_23°_LT1/LT4_Reverse Cooling_180cc_Street Head_Angle Plug_65cc_Assembled

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Price $2,220.00

Product Code: AFR-0908

Description

Technical Specs

AFR 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. Component upgrade and machining options are available to customize AFR Heads to your specific build. AFR heads are available bare (without parts), call our tech line for details.

180cc CNC Ported Intake Runners
A356 Aluminum
8 mm Bronze Valve guides
5 angle valve job
Precision CNC machining
Multiple spring options

Assembled heads feature:

8mm Bead Lock Valves
PAC Racing Valve Springs
3/8 studs
Adjustable guide plates

www.P65Warnings.ca.gov

Description
Item Code	AFR-0908
Vendor	Air Flow Research
Product Type	Cylinder Heads
Product Model	Street Head
Engine Family	Chevrolet - LT1
Weight	67

Included Components

Combustion Chamber	90% CNC Ported
Intake Ports	100% CNC Ported
Exhaust Ports	100% CNC Ported
Valve Job	Competition 5 Angle
Intake Valves	8mm Bead Lock Intake Valve - 2.020 x 4.900 Overall Length
Exhaust Valves	8mm Bead Lock Intake Valve - 1.600 x 4.950 Overall Length
Valve Springs	PAC Racing Spring - 1.290 OD - Hydraulic Roller Dual Valve Spring - 140 lbs on seat - .600 maximum lift - 6,300 to 6,500 Max RPM
Retainers	7° Manley Chrome Moly - 1.245 O.D x .885 I.D x .655 I.D
Keepers	7° Bead Lock
Rocker Studs	3/8 ARP
Guide Plates	5/16 Adjustable
Valve Seals	.600 OD x .495 ID
Spring Seat Cups	1.380 OD x .570 ID - Hardened
Intake Valve Seat	Ductile Iron - 2.200 OD x 1.750 ID x .375 Deep
Exhaust Valve Seat	Ductile Iron - 1.696 OD x 1.325 ID x .305 Deep
Valve Guides	8 mm Bronze - .502 OD x 2.100 Overall Length

Recommended Components

Intake Gasket	GM 12524653 LT1 or Fel-Pro 1284
Note	Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes.
Exhaust Gasket	Fel-Pro 1404
Head Gasket	Fel-Pro 1003
Head Bolts	ARP 134-3701
Head Studs	ARP 234-4301
Head Bolt Washers	Manley
Stud Girdle	AFR 6200
Intake Manifold	GM LT1 or LT4
Spark Plug Starting Range	Autolite 3924

Specifications and Features

Material	A356 Aluminum
Intake Port Volume	180cc
Intake Port Dimension	2.050 Height x 1.250 Width - 5/16 Radius
Intake Port Location	Stock
Exhaust Port Volume	64cc
Exhaust Port Dimension	1.410 Height x 1.550 Width
Exhaust Port Location	Raised .100
Combustion Chamber Volume	65cc
Valve Cover Bolt Pattern	Center or Perimeter Bolt - Factory accessory bolts and center bolt valve covers need to be shortened 3/16 to avoid bottoming out
Valve Angle	23°
Valve Spring Pocket Diameter	1.460 OD
Max Valve Spring Pocket Machining	1.750 OD
Note	Warning: Do not increase spring pad depth
Deck Thickness	.750
Minimum Bore Diameter	4.000
Flat Mill	.006 per cc 60cc Maximum
Angle Mill	.009 per cc 55cc Maximum
Note	Angle milling may require .120 thick intake gasket
Minimum Cross Sectional Area	1.810 sq in
Spark Plug Dimensions	14mm x .750 w/Gasket Seat

Flow Chart
Flow Data: cfm @ 28 inches of Water

Lift	.200	.300	.400	.500
Intake	138	198	240	260
Exhaust	110	158	190	207

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