Air Flow Research Releases The Mongoose for Your LS3
Advanced LS3 Heads
Air Flow Research introduces the 260-cc LS3 “Mongoose” cylinder heads, featuring a 100% CNC-ported intake, exhaust, and chambers using advanced engineering and flow techniques to produce the ultimate rectangle port head available today. The heads have A356 aluminum castings, titanium retainers, and the highest-quality components throughout. They’re designed for 4.000 or larger bore applications up to 454 cubic inches, operating up to 7000 rpm. These cylinder heads are emissions legal for 2008 to 2015 vehicles under CARB #D-250-5.
What’s Included
– 100% CNC-ported intake ports
– Competition five-angle valve job
– 8-mm bead-lock intake valve, 2.165″ x 5.195″ overall valve length
– 8-mm bead-lock exhaust valve, 1.600″ x 5.200″ overall valve length
– PAC Racing spring hydraulic roller dual-valve spring, 1.270″ O.D., 155 pounds on seat, max. 7000-7200 rpm
– 7-degree titanium retainers, 1.245″ O.D. x .885″ I.D x .655″ I.D.
– 7-degree bead-lock valve keepers
– Viton valve seals, 0.600″ O.D. x 0.495 I.D.
– Hardened valve spring O.D. locator, 1.380″ O.D. x .570″ I.D.
– Ductile iron intake-valve seats, 2.200″ O.D. x 1.750″ I.D. x .375″ deep
– Ductile iron exhaust-valve seats, 1.650″ O.D. x 1.350″ I.D. x .375″ deep
– 8-mm bronze valve guides, .502″ O.D. x 2.550″ O.A.L
– Rocker rail stand
Specifications and Features
| Material | A356 Aluminum |
| Intake Port Volume | 260 cc |
| Intake Port Dimension | 2.610″ H x 1.300″ W x 7/16° Radius |
| Intake Port Location | Stock |
| Exhaust Port Volume | 95 cc |
| Exhaust Port Dimension | 1.540″ H x 1.760″ W |
| Exhaust Port Location | Stock |
| Combustion Chamber Size | 69 cc |
| Valve-Cover Bolt Pattern | Center Bolt |
| Valve Angle | 12° |
| Valve-Spring Pocket Diameter | 1.490″ O.D. |
| Max Valve-Spring Pocket Machining | 1.510″ O.D. |
| Deck Thickness | 0.750″ |
| Minimum Bore Diameter | 4.000″ |
| Flat Mill: 65-cc Chamber | 0.006″ per cc, 62 cc Maximum |
| Minimum Cross Sectional Area | 2.875 sq. in. |
| Spark Plug Dimensions | 14 mm x 0.750″ w/Gasket Seat |
| Carb EO# | D-250-5 |
Check Out Some AFR Builds In Action
COMPANY DETAILS |
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Company |
Air Flow Research |
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Website |
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Phone |
(661) 257-8124 |
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Address |
28611 Industry Drive |
Valencia, CA 91355 |
ABOUT Air Flow Research®
For over FORTY-FIVE years Air Flow Research has been defining technological leadership in cylinder head manufacturing and flow dynamics. This complete commitment to performance has enabled Air Flow Research's cylinder heads to find themselves on the fastest race cars and the most powerful street machines in the country. As every engine builder will attest to, the secret to increasing horsepower and performance lies in the cylinder head. Air Flow Research's cylinder heads outflow and out horsepower everything in their league.
