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Air Flow Research

AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled

PART NUMBER:
1845
MPN:
1845
Availability:
Ships from Manufacturer
Shipping:
Free over $50 in U.S. 48
Type:
LS3 Cylinder Heads - Assembled
Material:
A356 Aluminum
CNC Machined Intake Runner:
Yes
CNC Machined Exhaust Runner:
Yes
CNC Machined Combustion Chamber:
Yes
Minimum Bore Size (in.):
4.000
Bolts Per Cylinder:
4
Assembled:
Yes
Valve Angle (°):
12
Intake Runner Volume (cc):
260
Exhaust Runner Volume (cc):
95
Chamber Volume (cc):
69
Intake Valve (in.):
2.165
Exhaust Valve (in.):
1.600
Accessory Holes:
Yes
Coolant Cross Over Ports:
Yes
Rocker Arm Rails Included:
Yes
Valve Guides Included:
Yes
Valve Guides Material:
Bronze
Intake Seat Material:
Ductile Iron
Exhaust Seat Material:
Ductile Iron
Valve Job:
5-Angle
Carb EO#:
D-250-5
Quantity:
Sold as a pair
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
  • AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled
$3,095.95

Description

AFR Mongoose LS3 260cc CNC Cylinder Heads 4-Bolt 1845 - Assembled

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. This product is street legal in 50 states from 2007 to 2016 emission controlled vehicles with a General Motors 6.2L LS engine.

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 5.200" Overall Valve Length
AFR #7214
8mm Bead Lock Exhaust Valve, 1.600" x 5.205" Overall Valve Length
AFR #7212
PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650 maximum lift, 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 2.200" O.D x 1.750" I.D x .375" Deep
AFR #9060
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 2.550" O.A.L
AFR #9053
Rocker Rail Stand
AFR #6040

 

260cc Aluminum LS3 Cylinder Heads
Part # Description Combustion Chamber
1840 CNC Ported w/parts - 6 Bolt 69cc
1845 CNC Ported w/parts - 4 Bolt 69cc

 

260cc Large Bore Competition 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: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe

Installation Instructions located in picture section.

 

 

 

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Warranty Information

Effective on purchase made on or after January 1, 2010, AFR warranties AFR aluminum cylinder head castings for the lifetime of the product with proof of purchase to the original purchaser. Additionally, valves, guides, valve seats, valve springs, retainers, locks, studs, guide plates, and valve seals are warranted for two years to the original purchaser with proof of purchase. All returns must have a RMA number in order to be returned, call for a RMA number. Parts must be returned prepaid freight by the original purchaser. When it has been determined, by AFR at its sole discretion, that the product does indeed have a warrantable problem from workmanship, materials, or an undetermined cause (mystery failure) AFR will repair at no charge and reimburse UPS ground freight and return UPS ground freight. AFR will repair or replace the casting at its option. This warranty doesn’t cover fitness for purpose and/or merchantability on any product sold by AFR. Non-AFR castings are covered by the manufacturer of that casting.
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