AFR 15° LS Cathedral Port Cylinder Head 230cc Fully CNC Ported, 72cc Chambers, Big Bore

AFR 15° LS Cathedral Port Cylinder Head 230cc Fully CNC Ported, 72cc Chambers, Big Bore

The AFR 230cc LS1 MONGOOSE cylinder heads are designed for aggressive street or street/strip applications, supporting displacements up to 427 cubic inches while operating at or below 7200 RPM. With fully CNC-ported intake, exhaust, and combustion chambers, these heads offer maximum efficiency and flow, capable of delivering 328 CFM at 0.650″ lift with a 4.000″ bore size.

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, 2.080″ x 4.900″ Overall Valve Length – AFR #7208
• 8mm Bead Lock Exhaust Valve, 1.600″ x 4.900″ Overall Valve Length – AFR #7228
• PAC Racing Spring 1.270″ OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650” maximum lift, Max RPM 7000-7200 – AFR #8019
• 7° Titanium Retainers 1.245″ O.D x .885″ I.D x .655″ 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 x .375″ Deep – AFR #9059
• Ductile Iron Exhaust Valve Seats 1.650″ O.D x 1.350″ I.D x .375″ Deep – AFR #9069
• 8 mm Bronze Valve Guides .502″ O.D x 2.100″ O.A.L – AFR #9051
• *LSX bead locks and aftermarket bead locks are not interchangeable. AFR locks are the same as GM LSX.

Performance Flow Chart

230cc Small Bore Competition Flow Data (CFM) – Test conducted at 28″ of water on Superflow 600, 3.900″ bore size:

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 230cc
• Exhaust Port Volume: 86cc
• Combustion Chamber Size: 62cc, 65cc, or 72cc
• Valve Angle: 15°
• Deck Thickness: .750″
• Minimum Bore Diameter: 3.900″
• Spark Plug Dimensions: 14mm x .750″ w/Tapered Seat
• CARB Status: This product is not legal for sale or use on emission-controlled vehicles and is intended for dedicated race vehicles only.