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NK Performance and Racing

AFR Mongoose 215CC LS1 CYLINDER HEADS

AFR Mongoose 215CC LS1 CYLINDER HEADS

Regular price $2,793.75 USD
Regular price Sale price $2,793.75 USD
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Spring Upgrade
Exhaust Valve Upgrade
215cc LS1 Cylinder Head

AFR's 215cc mongoose cylinder heads a recommended for moderate street or street/strip builds with displacements up to 408 cubic inches operating at or below 6500 RPM. This medium sized, high velocity torque monster flows 312 CFM @0.600" of lift.


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, 2.020” x 4.900" Overall Valve Length
8mm Bead Lock Exhaust Valve, 1.600” x 4.900" Overall Valve Length
PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring,
140 lbs on seat, .600" maximum lift, Max RPM 6300-6500, less than 235* duration, upgraded spring #8019 recommended for higher RPM & larger cams
7° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D
7° Bead Lock Valve Keepers
Viton Valve Seals .600" O.D x .495" I.D
Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D
Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep
Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep
8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L


*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.

215cc Competition Flow Chart
  .200 .300 .400 .500 .550 .600
Int 149 215 259 293 300 303
Exh 111 150 209 225 230 233

Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", intake 3/4" radius plate exhaust, 1 3/4" curved pipe


Specifications & Features:
Material
A356 Aluminum
Intake Port Volume
215cc
Intake Port Dimension
3.275"H x 1.120"W x5/16 top 3/8 bottom
Intake Port Location
Stock
Exhaust Port Volume
85cc
Exhaust Port Dimension
1.415" H x 1.710" W
Exhaust Port Location
Stock
Combustion Chamber Size
65cc
Valve Cover Bolt Pattern
Center Bolt
Valve Angle
15°
Valve Spring Pocket Diameter
1.510" O.D
Max Valve Spring Pocket Machining
1.525" O.D
Deck Thickness
.750"
Minimum Bore Diameter
3.900"
Flat Mill
.006" per cc 58cc Maximum
Minimum Cross Sectional Area
2.260 sq. in.
Spark Plug Dimensions
14mm x .750" w/Gasket Seat
CARB Status: This product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only.
 
Recommended Components:
Intake Port Gasket
GM or FAST
Exhaust Port Gasket
GM#12558573
Head Gasket
Cometic 4.160 .040" or AFR #6848
Head Bolts (97-03)
ARP 134-3609 or AFR #6330
Head Studs (97-03)
ARP 234-4110 or AFR #6331
Head Bolts (04+)
ARP 134-3610 or AFR #6334
Head Studs (04+)
ARP 234-4317 or AFR #6335
Head Bolt Washers, Manley
Suggested Manifold
FAST 90mm, 92mm, or 102mm
Spark Plug Starting Range
NGK TR55
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