AFR Cylinder Heads

Custom Piston Worksheet & Order Form (pdf)

Home > Cylinder Heads > Air Flow Research Cylinder Heads > Chevrolet - LS Series > Chevrolet LSx - Cathedral Port - Competition >

AFR Cylinder Heads_Chevrolet_LSx_15°_245cc_73cc_Competition_4.000 Bore_Assembled

Photo may not be actual product

Alternative Views:

Price $3,070.00

Product Code: AFR-1690

Description

Technical Specs

AFR 245cc LSx Competition ported heads feature 100% CNC ported intake, exhaust and chambers in A356 aluminum castings, Titanium retainers and high quality components are utilized throughout. They are recommended for race applications or radical Pro Street style builds with displacements up to 454 cubic inches, operating up to 6800 RPM. Requires minimum 4.000 bore size or intake valve clearance. 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.

245cc CNC Ported Intake Runners
A356 Aluminum
8mm Bronze Valve guides
5 angle valve job
Precision CNC machining
Multiple spring options

Assembled heads feature:

8mm Bead Lock Valves
PAC Racing Valve Springs
7° Titanium Retainers
LS1 Type 7° bead locks

www.P65Warnings.ca.gov

Description
Item Code	AFR-1690
Vendor	Air Flow Research
Product Type	Cylinder Heads
Product Model	Mongoose
Engine Family	Chevrolet LSx 15°
Weight	64

Included Components

Combustion Chamber	100% CNC Ported
Intake Ports	100% CNC Ported
Exhaust Ports	100% CNC Ported
Valve Job	Competition 5 Angle
Intake Valves	8mm Bead Lock Intake Valve - 2.165 x 4.900 Overall Length
Exhaust Valves	8mm Bead Lock Intake Valve - 1.600 x 4.900 Overall Length
Valve Springs	PAC Racing Spring - 1.270 OD - Hydraulic Roller Dual Valve Spring - 155 lbs on seat - .650 maximum lift - 7000-7200 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
Guide Plates
Valve Seals	.600 OD x .495 ID
Spring Seat Cups	1.380 OD x .570 ID - Hardened
Intake Valve Seat	Ductile Iron - 2.131 OD x 1.680 ID x .375 Deep
Exhaust Valve Seat	Ductile Iron - 1.650 OD x 1.350 ID x .375 Deep
Valve Guides	8 mm Bronze - .502 OD x 2.100 Overall Length

Recommended Components

Intake Gasket	GM or FAST
Exhaust Gasket	GM 12558573
Head Gasket	Cometic 4.160 x .040
Head Bolts	ARP 134-3609 (97-03) or 134-3610 (04 up)
Head Studs	ARP 234-4110 (97-03) or 234-4317 (04 up)
Head Bolt Washers	Manley
Stud Girdle	AFR 6200
Intake Manifold	FAST 90, 92 or 102mm
Spark Plug Starting Range	NGK TR55

Specifications and Features

Material	A356 Aluminum
Intake Port Volume	245cc
Intake Port Dimension	3.315 Height x 1.145 Width - 11/32 Top Radius - 13/32 Bottom
Intake Port Location	Stock
Exhaust Port Volume	88cc
Exhaust Port Dimension	1.495 Height x 1.730 Width
Exhaust Port Location	Stock
Combustion Chamber Volume	73cc
Valve Cover Bolt Pattern	Center Bolt
Valve Angle	15°
Valve Spring Pocket Diameter	1.510 OD
Max Valve Spring Pocket Machining	1.525 OD
Deck Thickness	.750
Minimum Bore Diameter	4.000
Flat Mill	.006 per cc 65cc Maximum
Angle Mill
Minimum Cross Sectional Area	2.680 sq in
Spark Plug Dimensions	14mm x .750 w/Tapered Seat
CARB EO Number	D-250-4

Flow Chart
Flow Data: cfm @ 28 inches of Water

Lift	.200	.300	.400	.500	.550	.600	.650
Intake	164	233	290	332	347	356	.360
Exhaust	131	185	227	247	249	257	267

Browse for more products in the same category as this item:

Cylinder Heads > Air Flow Research Cylinder Heads > Chevrolet - LS Series > Chevrolet LSx - Cathedral Port - Competition