1660 AFR 230cc LS1 15 Degree Cylinder Head (Pair)

Your Price: $2,591.00
Part Number: 4404
Availability: In Stock

Choose Options and Quantity

*
*

Send to:

*We'll ask for shipping info at checkout
AFR’s emission legal (CARB #D-250-4) 230cc LSX heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, Titanium retainers and high quality components throughout. Recommended for aggressive street or street/strip builds with displacements up to 427 cubic inches, operating up to 7200 RPM. Requires minimum 3.900” bore size for intake valve clearance. 

230cc Aluminum LS1 Cylinder Heads
Part # Description Combustion Chamber
1610* Large Bore (4.000+) 62cc
1630* Large Bore (4.000+) 72cc
1660 Small Bore (3.900+) 65cc

230cc Small Bore Race Head Flow Chart
  .200 .300 .400 .500 .550 .600
Int 157 224 272 311 320 324
Exh 129 183 225 244 248 252
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 3.900", 3/4" radius plate exhaust, 1 3/4" curved pipe

230cc Large Bore Race Head Flow Chart
  .200 .300 .400 .500 .550 .600
Int 158 230 282 320 325 328
Exh 129 183 225 244 248 252
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", 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, 2.080" x 4.900" Overall Valve Length
AFR #7208
8mm Bead Lock Exhaust Valve, 1.600" x 4.900" Overall Valve Length
AFR #7228
PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, Max RPM 7000-7200
AFR #8019
7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D
AFR #8512
7° Bead Lock Valve Keepers
AFR #9007*
Viton Valve Seals .600" O.D x .495" I.D
AFR #6612
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D
AFR #8042
Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep
AFR #9059
Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep
AFR #9069
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L
AFR #9051
*LSX bead locks and aftermarket bead locks are not interchangeable. GM made their bead lock radius and depth different. AFR locks are the same as GM LSX.

Specifications & Features:
Material
A356 Aluminum
Intake Port Volume
230cc
Intake Port Dimension
3.250"H x 1.115"W x5/16 top 3/8 bottom
Intake Port Location
Stock
Exhaust Port Volume
86cc
Exhaust Port Dimension
1.385" H x 1.695" W
Exhaust Port Location
Stock
Combustion Chamber Size
62cc, 65cc, or 72cc
Valve Cover Bolt Pattern
Center Bolt
Valve Angle
15°
Valve Spring Pocket Diameter
1.510" O.D
Max Valve Spring Pocket Machining
1.525" O.D
Deck Thickness
.750"
Minimum Bore Diameter
3.900"
Flat Mill - 62cc chamber
.006" per cc 58cc Maximum
Flat Mill - 72cc chamber
.006" per cc 67cc Maximum
Minimum Cross Sectional Area
2.425 sq. in.
Spark Plug Dimensions
14mm x .750" w/Gasket Seat
CARB E.O.
#D-250-4

“WARNING”: This product may contain a chemical(s) known to the State of California to cause cancer and/or birth defects or other reproductive harm.  www.P65Warnings.ca.gov”

Reward Points

39 points will be rewarded to you when you buy this item.

Related Items

0 Items
TOP