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Air Flow Research

AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled

PART NUMBER:
1680
MPN:
1680
Availability:
Ships from Manufacturer
Shipping:
Free over $98 in U.S. 48
Type:
Cathedral Port 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 (°):
15
Intake Runner Volume (cc):
245
Exhaust Runner Volume (cc):
88
Chamber Volume (cc):
65
Intake Valve (in.):
2.165
Exhaust Valve (in.):
1.600
Accessory Holes:
Yes
Coolant Cross Over Ports:
Yes
Rocker Arm Rails:
No
Valve Guides Included:
Yes
Valve Guides Material:
Bronze
Intake Seat Material:
Ductile Iron
Exhaust Seat Material:
Ductile Iron
Valve Job:
5-Angle
Quantity:
Sold as a pair
  • AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled
  • AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled
  • AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled
  • AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled
  • AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled
  • AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled
  • AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled
$3,069.71

Description

AFR Mongoose LS 245cc Cathedral Port CNC Cylinder Heads 1680 - Assembled

AFR’s 245cc LS1/LS2/LS6 “Competition” ported heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, Titanium retainers and high quality components throughout. 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 for intake valve clearance.

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, 2.165" x 4.900" Overall Valve Length
AFR #7211
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, .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 2.100" 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. 

245cc Large Bore Competition Flow Chart
  .200 .300 .400 .500 .550 .600 .650
Int 164 233 290 332 347 356 360
Exh 131 185 227 247 249 257 267

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

Installation Instructions located in pictures

 

 

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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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