AFR’s emission legal (CARB #D-250-4) 210cc LSX heads are the cost effective performance 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.
210cc LSX Aluminum Cylinder Head Flow Chart
Tested on and designed specifically for 3.900 Bore
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 AFR #7207
- 8mm Bead Lock Exhaust Valve, 1.600” x 4.900" Overall Valve Length AFR #7228
- PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 AFR #8017
- 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. GM made their bead lock radius and depth different. AFR locks are the same as GM LSX.
Recommended Components:
- Intake Port Gasket: GM or FAST
- Exhaust Port Gasket: GM#12558573
- Spark Plug Starting Range: NGK TR55
Specifications & Features:
- Material: A356 Aluminum
- Intake Port Volume: 210cc
- Intake Port Dimension: 3.275"H x 1.120"W x5/16 top 3/8 bottom
- Intake Port Location: Stock
- Exhaust Port Volume: 84cc
- Exhaust Port Dimension : 1.415" H x 1.710" W
- Exhaust Port Location: Stock
- Combustion Chamber Size: 66cc
- 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: 2.185 sq. in.
- Spark Plug Dimensions: 14mm x .750" w/Gasket Seat
- CARB E.O.: #D-250-4
