LS1 210cc Mongoose Street Heads

Sale: $2,461.70
Save: -3% off

210cc LSX "Mongoose" 15° Street Head


The Small Port, High Velocity Torque Monster

Designed Specifically for 3.900 Bore


LSX 210cc Mongoose cylinder head
Designed specifically for 3.900 Bore
Click to enlarge

AFR's 210cc LSX heads are the preferred choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, Titanium retainers and high quality components throughout. Recommended for street, towing, or street/strip engines with displacements up to 383 cubic inches, operating up to 6300 RPM. Requires minimum 3.900 bore size for intake valve clearance. Legal for 2005 and older emissions controlled vehicles under CARB EO #D-250-4. Component upgrade and machining options are available to customize AFR Heads to your specific build, please email, chat or call for details.

210cc LSX Aluminum Cylinder Head Flow Chart

Tested on and designed specifically for 3.900 Bore

LS1 Flow Chart 


Included Components

100% CNC Ported Combustion Chambers

100% CNC Ported Exhaust Ports

100% CNC Ported Intake Ports

Competition 5-angle Valve Job

AFR #72078mm Bead Lock Intake Valve, 2.020” x 4.900" Overall Valve Length

AFR #72288mm Bead Lock Exhaust Valve, 1.600” x 4.900" Overall Valve Length

AFR #8017PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring,
140 lbs on seat, .600" maximum lift, Max RPM 6300-6500

AFR #85127° Titanium Retainers 1.245" O.D x .885" I.D x .655" I.D

AFR #9007*7° Bead Lock Valve Keepers

AFR #6612Viton Valve Seals .600" O.D x .495" I.D

AFR #8042Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D

AFR #9059Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep

AFR #9069Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep

AFR #90518 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.


Specifications & Features:

A356 AluminumMaterial

210ccIntake Port Volume

3.275"H x 1.120"W x5/16 top 3/8 bottomIntake Port Dimension

StockIntake Port Location

84ccExhaust Port Volume

1.415" H x 1.710" WExhaust Port Dimension

StockExhaust Port Location

66ccCombustion Chamber Size

Center BoltValve Cover Bolt Pattern

15°Valve Angle

1.510" O.DValve Spring Pocket Diameter

1.525" O.DMax Valve Spring Pocket Machining

.750"Deck Thickness

3.900"Minimum Bore Diameter

.006" per cc 58cc MaximumFlat Mill

2.185 sq. in.Minimum Cross Sectional Area

14mm x .750" w/Gasket SeatSpark Plug Dimensions

D-250-4Carb EO#


Recommended Components:

GM or FASTIntake Port Gasket

GM#12558573Exhaust Port Gasket

AFR #6846Head Gasket, Cometic 3.930 .040"

AFR #6330Head Bolts (97-03)

AFR #6331Head Studs (97-03)

AFR #6334Head Bolts (04+)

AFR #6335Head Studs (04+)

AFR #6320Head Bolt Washers, Manley

FAST 90mm, 92mm, or 102mmSuggested Manifold

NGK TR55Spark Plug Starting Range

Add to Cart:

  • Model: AFR1510
  • Shipping Weight: 68lbs