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AFR 245cc LS1 Mongoose CNC Ported 6-Bolt Cylinder Heads, 65cc Chambers, With Parts
AFR 1682
AFR's 245cc LS1 heads feature 100% CNC ported intake, exhaust & chambers, Titanium retainers and high quality components throughout. Recommended for aggressive street or street/strip builds with displacements up to 427 cubic inches, operating at or below 7200 RPM. Requires minimum 4.000 bore size for intake valve clearance. Component upgrade and machining options are available to customize AFR Heads to your specific build.
Shipping: FREE continental USA ground shipping on ALL AFR Cylinder Heads
Pricing:
$3,161.00
Description
Built for big-air LS combos, AFR’s 245cc heads leverage our new permanent-mold casting to deliver exceptional strength, repeatability, and port finish—ideal for high-rpm, big-cube, and power-adder builds. The 6-head-bolt configuration adds critical clamping force for superior gasket life and stability under sustained load, making it the go-to choice when you’re leaning on the tune.
| Basic Package Components | Part # |
| 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, 2.165" x 4.900" Overall Valve Length | AFR #7211 |
| 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, Max RPM 7000-7200 | AFR #8019 |
| *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. | *Notes |
| 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 2.200" O.D x 1.750" I.D x .375" Deep | AFR #9060 |
| 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 |
| Specifications, Features, and Optional Supporting Components |
| Material | A356 Aluminum |
| Intake Port Volume | 245cc |
| Intake Port Dimension | 3.315"H x 1.145"W x 11/32 top 13/32 bottom |
| Intake Port Location | Stock |
| Exhaust Port Volume | 88cc |
| Exhaust Port Dimension | 1.495" H x 1.730" W |
| Exhaust Port Location | Stock |
| Combustion Chamber Size | 65cc |
| 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 |
| Minimum Bore Diameter | 4.000" |
| Deck Thickness | .750" |
| Flat Mill - 65cc chamber | .006" per cc 58cc Maximum |
| Minimum Cross Sectional Area | 2.680 sq. in. |
| Spark Plug Dimensions | 14mm x .750" w/Tapered Seat |
Important: Do not port match you intake manifold to any Fel-Pro gasket as it does not precisely match AFR heads.
Note: Milling head deck will affect flow numbers.
Details
- AFR 1682
- AFR 1682
- Air Flow Research
- New
Categories
Shipping Information
- Item Requires Shipping
- 65.0 lbs.
- W12.0000” x H12.0000” x L24.0000”
- Free Basic Shipping
- This item ships in its own box.
- FREE continental USA ground shipping on ALL AFR Cylinder Heads
- TRE Performance Difference
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