AFR 1690 LSX Mongoose Street Aluminum Cylinder Heads, 245CC, 2.160/1.6 in. Valves, 73cc Comb

$2,812.10
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SKU:
AFR1690
MPN:
1690
Condition:
New
Weight:
59.25 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

Out of stock

AFR's max effort cathedral port head for the LSX platform is recommended for race applications or radical "Pro Street" builds with displacements up to 454 cubic inches, operating at or below 6800 RPM. Requires a minimum bore size of 4.000 in. to clear the supplied 2.165 in. intake valve.

Features

  • 2.160"/1.60" stainless valves
  • 87cc exhaust runners
  • 245cc Intake Runners
  • 65cc Combustion Chambers
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Cylinder Head Finish:
Natural
CNC-Machined Combustion Chamber:
Yes
Combustion Chamber Volume (cc):
73cc
Combustion Chamber Style:
Heart
CNC-Machined Intake Runner:
Yes
Intake Runner Volume (cc):
245cc
Intake Port Shape:
Cathedral
Intake Port Location:
Standard
Intake Valve Angle:
15 degree
CNC-Machined Exhaust Runner:
Yes
Exhaust Runner Volume (cc):
88cc
Exhaust Port Shape:
Round
Exhaust Port Location:
Standard
Exhaust Valve Angle:
15 degree
Intake Valves Included:
Yes
Intake Valve Diameter (in.):
2.165 in.
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.60 in.
Valve Type:
Stainless
Maximum Valve Lift (in.):
0.650 in.
Valve Springs Included:
Yes
Valve Spring Type:
Dual W/Damper
Outside Diameter of Outer Spring (in.):
1.290 in.
Valve Guides Included:
Yes
Valve Guide Material:
Manganese bronze
Valve Seats Machined:
Yes
Valve Seat Material:
Ductile iron
Valve Seat Machine Style:
5-angle intake/3-angle exhaust
Retainers Included:
Yes
Retainer Material:
Titanium
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
Viton Positive stop
Locks Included:
Yes
Lock Style:
7 degree
Camshaft Style:
Hydraulic roller
Spark Plug Style:
Angled
Guideplates Included:
No
Guideplate Pushrod Size:
5/16 in.
Rocker Arm Studs Included:
No
Rocker Arm Nut Thread Size:
10mm x 1.0
Accessory Bolt Holes Drilled:
Yes
Valve Cover Mounting Style:
Centerbolt
Heat Crossover:
No
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Quantity:
Sold as a pair.
Notes:
Must be used on 4 in. bore or larger. Valve Spring Pressure, 155 lbs closed. Spark Plug Type 14mm Spark Plug, .690 Reach, 5/8 Hex
Make:
Chevrolet
Engine Family:
Chevy small block Gen III/IV (LS-based engines)
Engine Sizes:
6.2L/376-7.0L/427
Years:
2006-2017