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AFR 385cc BBC Marine Cylinder Heads, 100% CNC Ported, Titanium Retainers
AFR 2020B-TI
AFR is proud to announce their new BBC Marine Cylinder Head! These AFR 385cc heads are designed feature partially CNC ported intake, inconel exhaust valves, hydraulic roller springs, hard coat anodizing, Titanium retainers, and high quality components throughout. These heads are best suited for large displacement (540+) high RPM Big Block Chevrolet racing engines. 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:
$5,792.02
Sale:
$5,492.02
Save:
5%
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.
Note: Optional stud girdle required for 2° rolled valve angles and 1" longer head bolts needed on four bottom exhaust bolt holes. Longer pushrods might also be required.
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
| Basic Package Components | Part # |
|
100% CNC Ported Chambers, Exhaust, and Intake
Competition 5-angle Valve Job |
|
| 11/32" Intake Valve, 2.350" x 5.500" O.A.L | AFR #7627 |
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length | AFR #7631 |
| PAC Racing Spring #1224 1.625 O.D. Hydraulic Roller, 275lbs on seat, .725 Maximum Lift, Max RPM 6500 | AFR #8061 |
| 10° Titanium Retainer 1.500" O.D x 1.180" I.D x .765" I.D | AFR #8507 |
| 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 #6854 (.120" Thick) or AFR #6856 (.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 Full CNC |
| Valve Spring Pocket Diameter | 1.725 O.D |
| Intake Port Dimension | 2.565"H x 1.810"W x 15/32 Radius |
| Exhaust Port Dimension | 1.780"H x 2.025" W |
| Valve Angle | 24°/4° Intake, 15°/4° Exhaust |
| Angle Mill | .009" per cc/Maximum 104cc |
| Flat Mill | .006" per cc/ Maximum 114cc |
| Stud Girdle, (AFR Specific) | AFR #6202 |
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads.
Note: 1" longer head bolts needed on four bottom exhaust bolt holes.
Details
- AFR 2020B-TI
- AFR 2020B-TI
- 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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