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AFR GM LS3 Mongoose 100% CNC Ported Square Port Cylinder Heads
Features 100% CNC ported intake, exhaust, and chambers using their advanced engineering and flow techniques to produce the ultimate rectangle port head available today. At .650" lift, they will flow 377 intake and 251 exhaust at 28" of water. 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. Emmisions legal for 2008 to 2015 vehicles under CARB #D-250-5.
Assemblies feature 2.165"/1.600" stainless steel valves, PAC 1.270" dual hydraulic roller valve springs (to .650" lift), titanium retainers and 8mm bead lock valve locks.
Part Type: Cylinder Heads
Application: Chevrolet/GM LS3
Cylinder Head Material: A356 Aluminum
Bare or Assembled: Assembled
Combustion Chamber Size: 69cc
CNC Machined Combustion Chambers: Yes
Intake Valve Angle: 21
Exhaust Valve Angle: 21
Intake Port Volume: 260cc
CNC Machined Intake Port: Yes
Intake Port Flow: 377 cfm @ .650" Lift / 28"
Intake Port Location: Standard
Intake Port Shape: Rectangle
Intake Port Dimensions: 2.610"H x 1.300"W x 7/16" Radius
Suggested Intake Gaskets: Fel-Pro 1222-2 or Equivalent
Exhaust Port Volume: 95cc
CNC Machined Exhaust Port: Yes
Exhaust Port Flow: 251 cfm @ .650" Lift / 28"
Exhaust Port Location: Standard
Exhaust Port Shape: Standard
Exhaust Port Dimensions: 1.540"H x 1.760"W
Suggested Exhaust Gaskets: GM#12558573
Spark Plug Style: Angled
Suggested Spark Plug: 14mm x .750" w/ Gasket Seat
Valve Guides: Bronze
Valve Guide Spacing:
Valve Stem Diameter: 8mm
Valve Seats: Ductile Iron
Valve Job: 5 Angle
Intake Valve Diameter: 2.165"
Intake Valve Included: Yes
Exhaust Valve Diameter: 1.600"
Exhaust Valve Included: Yes
Suggested Valve Length: Intake: 5.195", Exhaust: 5.200"
Valve Spring Pockets: 1.490", 1.510" Maximum
Valve Springs Included: Yes, 1.270" Dual
Valve Spring Application: Hydraulic Roller, 155lbs. Seat, .650" Max Lift
Valve Springs Retainers Included: Yes (Titanium)
Valve Locks Included: Yes (7 Degree)
Valve Seals Included: Yes, Viton
Rocker Studs Included: No
Guide Plates Included: No
Valve Cover Mounting Style: Centerbolt
Steam Holes Drilled: No
Heat Crossover: No
Suggested Head Bolts: ARP134-3610
Suggested Head Studs: ARP234-4317
Suggested Stud Girdle: NA
Head Bolt Torque with Oil:
Rocker Stud Torque with Oil:
Intake Bolt Torque with Oil:
Manufacturer: Air Flow Research
Manufacturer's Part Number: 1840
Weight:
Warranty: https://www.airflowresearch.com/warranty/
Quantity: Sold as Pair
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