LSX 230cc CNC Alum Heads Mongoose Strip 72cc

AFR 230cc LS1 Mongoose Cylinder Head

If you're after top-tier street/strip performance, AFR's 230cc LS1 Mongoose heads are built to handle it. Designed for aggressive builds with up to 427 cubic inches, these heads keep the air movin' at high RPMs, flowin' 328 CFM at 0.650" lift with a 4.000" bore.

Included Components

• 8mm Bead Lock Intake Valve: 2.080" x 4.900" O.A.L., AFR #7208
• 8mm Bead Lock Exhaust Valve: 1.600" x 4.900" O.A.L., AFR #7228
• PAC Racing Spring: 1.270" OD, 155 lbs on seat, .650" max lift, AFR #8019
• 7° Titanium Retainers: 1.245" O.D x .885" 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: 2.131" O.D x 1.680" I.D, AFR #9059
• Ductile Iron Exhaust Valve Seats: 1.650" O.D x 1.350" I.D, AFR #9069
• 8 mm Bronze Valve Guides: .502" O.D x 2.100" O.A.L, AFR #9051

Note: LSX bead locks and aftermarket bead locks aren’t interchangeable with GM.

Flow Chart

Tested at 28" of water on Superflow 600. Bore Size: 3.900"

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 230cc
• Exhaust Port Volume: 86cc
• Combustion Chamber Size: 62cc, 65cc, or 72cc
• Deck Thickness: .750"
• Minimum Bore Diameter: 3.900"
• Valve Angle: 15°
• Spark Plug Dimensions: 14mm x .750" w/Tapered Seat
• CARB Status: Race vehicles only; not for emission-controlled vehicles.

Recommended Components

• Intake Port Gasket: GM or FAST
• Exhaust Port Gasket: GM #12558573
• Head Gasket for Small Bore: Cometic 3.930 .040" or AFR #6846
• Head Gasket for Large Bore: Cometic 4.160 .040" or AFR #6848
• Head Bolts (97-03): ARP 134-3609 or AFR #6330
• Suggested Manifold: FAST 90mm, 92mm, or 102mm
• Spark Plug Starting Range: NGK TR55