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AFR 305cc BBC Marine Rectangle Port Cylinder Heads, Partially Ported
AFR 2100B
AFR is proud to announce their new BBC Marine Cylinder Head! This AFR 305cc marine rectangle port heads feature partially inconel exhaust valves, hydraulic roller springs, hard coat anodizing and high quality components throughout. Recommended for moderate street, or street/strip builds with displacements up to 509 cubic inches, operating up to 6500 RPM. Also available with 100% CNC chambers for increased air flow (see chart). Component upgrades and machining options are available to customize AFR Heads to your specific build.
Shipping: FREE continental USA ground shipping on ALL AFR Cylinder Heads
Was:
$4,351.91
Sale:
$4,051.91
Save:
7%
Save:
$300.00
Description
AFR has been manufacturing BBC Marine Cylinder Heads for over a decade with great success. Many of the top marine engine builders in the industry rely on AFR for the performance in their engines. Today we are pleased to announce that you too can receive the same great AFR performance with an easier way to order your AFR cylinder heads. These cylinder head assemblies will come complete with Inconel Exhaust Valves, Hydraulic Roller Springs, and Hard Coat Anodizing.
| Basic Package Components | Part # |
| 50% CNC Ported Exhaust Ports 20% CNC Ported Intake Ports 30% CNC Ported Combustion Chambers Competition 5-angle Valve Job |
|
| 11/32" Intake Valve, 2.250" x 5.500" O.A.L | AFR #7620 |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length | AFR #7630 |
| Manley 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D | AFR #8518 |
| PAC Racing Spring #1224 1.625 O.D. Hydraulic Roller, 275lbs on seat, .725 Maximum Lift, Max RPM 6500 | AFR #8061 |
| 10° 11/32" Valve Locks with lashcap recess | AFR #9005 |
| ARP 7/16" Rocker Exhaust Studs | AFR #6406 |
| ARP 7/16" Rocker Intake Studs | AFR #6407 |
| Adjustable 3/8" Guide Plates | AFR #6109 |
| 11/32" Viton Valve Seals | AFR #6611 |
| Hardened Spring Cup 1.740" O.D / 1.650" I.D | AFR #8046 |
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep | AFR #9062 |
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep | AFR #9064 |
| 11/32" Intake Bronze Valve Guides .531" O.D x 2.10" O.A.L | AFR #9045 |
| 11/32" Exhaust Bronze Valve Guides .531" O.D x 2.25" O.A.L | AFR #9046 |
| Specifications, Features, and Optional Supporting Components |
| Head Torque | 75 ft. lbs |
| Intake Port Gasket | AFR #6853 (.120" Thick) or AFR #6855 (.060" Thick) |
| Exhaust Port Gasket | AFR #6858 |
| Head Gasket, Fel-Pro #1047 (Mark V and VI) | AFR #6849 |
| Head Gasket, Fel-Pro #1017-1 (Mark IV) | AFR #6350 |
| Head Bolts, ARP 135-3703 (Mark IV) | AFR #6306 |
| Head Bolts, ARP 135-3707 (Mark V) | AFR #6308 |
| Head Studs, ARP 235-4713 | AFR #6307 |
| Head Bolt Washers, Manley | AFR #6320 |
| Suggested Manifold |
Super VictorVictor Jr.,
|
| Spark Plug Starting Range | Autolite 3932 |
| Combustion Chambers | 121cc w/ CNC Chambers or 117cc w/ As Cast Chambers |
| Valve Spring Pocket Diameter | 1.725 O.D |
| Intake Port Dimension | 2.380"H x 1.680"W x 11/32 Radius |
| Exhaust Port Dimension | 1.720"H x 1.920" W |
| Valve Angle | 24°/4° Intake, 15°/4° Exhaust |
| Angle Mill | .009" per cc/ Maximum 104cc as cast or CNC Chamber |
| Flat Mill | .006" per cc/ Maximum 108cc as cast or 114cc CNC Chamber |
| Stud Girdle, (AFR Specific) | AFR #6202 |
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. 1" longer head bolts needed on four bottom exhaust bolt holes. Angle mills might require a .120 thick intake gasket.
Details
- AFR 2100B
- AFR 2100B
- Air Flow Research
- New
Shipping Information
- Item Requires Shipping
- 80.0 lbs.
- W24.0000” 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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