AFR 215cc LS1 Cylinder Heads - Pair

AFR 215cc LS1 Cylinder Heads - Pair

If you're lookin’ to up your street or street/strip game, AFR’s 215cc LS1 Mongoose heads are ready to bring some serious torque to the party. Tailor-made for moderate builds with displacements up to 408 cubic inches and operating under 6500 RPM, these heads are all about flow, with intake runners movin' 312 CFM at 0.600" lift.

Included Components

• 8mm Bead Lock Intake Valve: 2.020" x 4.900" O.A.L., AFR #7207
• 8mm Bead Lock Exhaust Valve: 1.600" x 4.900" O.A.L., AFR #7228
• PAC Racing Spring: 1.290" OD, 140 lbs on seat, .600" max lift, AFR #8017 (upgraded spring #8019 recommended for high RPM)
• 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.

Flow Chart

Tested at 28" of water on Superflow 1020. Bore Size: 4.060"

Specifications & Features

• Material: A356 Aluminum
• Intake Port Volume: 215cc
• Exhaust Port Volume: 85cc
• Combustion Chamber Size: 65cc
• Deck Thickness: .750"
• Minimum Bore Diameter: 3.900"
• Valve Angle: 15°
• Spark Plug Dimensions: 14mm x .750" w/Gasket Seat
• CARB Status: Dedicated race vehicles only; not legal on emission-controlled vehicles.

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
• Suggested Manifold: FAST 90mm, 92mm, or 102mm
• Spark Plug Starting Range: NGK TR55