AFR 1845/1840 LS3 260/69CC .650 LIFT ASSEMBLED YOUR CHOICE OF 4 OR 6 BOLT HEADS

Regular price $ 2,661.20

CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.

 AFR’s 260cc LS3 “Mongoose” heads feature 100% CNC ported intake, exhaust and chambers using our advanced engineering and flow techniques to produce the ultimate Rectangle Port head available today. Featuring A356 aluminum castings, titanium retainers and the highest quality components, throughout. They’re designed for 4.000 or larger bore applications up to 454 CI, operating up to 7000 RPM. Emmisons legal for 2008 to 2015 vehicles under CARB #D-250-5. To ensure trouble free operation please view the footnotes on pg. 54 of AFR's website.

260cc Aluminum LS1 Cylinder Heads
Part # Description Combustion Chamber
1840 CNC Ported w/parts 6 Bolts 69cc
1845 CNC Ported w/parts 4 Bolts 69cc

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260cc Street Head Flow Chart
  .200 .300 .400 .500 .600 .650 .700
Int 159 234 293 336 366 377 384
Exh 112 158 207 235 248 251 255

Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.155", 3/4" radius plate exhaust, 1 3/4" curved pipe

Basic Package 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, 2.165" x 5.195" Overall Valve Length
7214
8mm Bead Lock Exhaust Valve, 1.600" x 5.200" Overall Valve Length
7212
PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, Max RPM 7000-7200
8019
7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D
8512
7° Bead Lock Valve Keepers
9007
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 1.650" O.D x 1.350" I.D x .375" Deep
9069
8 mm Bronze Valve Guides .502" O.D x 2.550" O.A.L
9053
Rocker Rail Stand
AFR #6040
Specifications & Features:
Material
A356 Aluminum
Intake Port Volume
260cc
Intake Port Dimension
2.610"H x 1.300"W x 7/16° Radius
Intake Port Location
Stock
Exhaust Port Volume
95cc
Exhaust Port Dimension
1.540" H x 1.760" W
Exhaust Port Location
Stock
Combustion Chamber Size
69cc
Valve Cover Bolt Pattern
Center Bolt
Valve Angle
12°
Valve Spring Pocket Diameter
1.490" O.D
Max Valve Spring Pocket Machining
1.510" O.D
Deck Thickness
.750"
Minimum Bore Diameter
4.000"
Flat Mill - 65cc chamber
.006" per cc 62cc Maximum
Minimum Cross Sectional Area
2.875 sq. in.
Spark Plug Dimensions
14mm x .750" w/Gasket Seat
Carb EO#
D-250-5

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CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.

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Warning: May cause cancer and reproductive harm.