AFR Direct Master Warehouse Distributor – All AFR Products Available. AFR 305cc BBC Rectangle Cylinder Heads. 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. AFR Part # 2100B. There are many different options available for AFR heads, please view the details section below for the details on these heads. For the many other AFR heads available, and options such as upgrading springs or retainers. 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: 1 longer head bolts needed on four bottom exhaust bolt holes. Angle mills might require a. 120 Thick intake gasket. CUSTOM ORDER – typically takes 3-4 weeks. 2100B – 305cc BBC Rectangle Port Assembled w/Inconel Exh, Hyd Roller Spring, Hard Coat Anodize 3050B – 305cc BBC Rectangle Port Bare w/Hard Coat Anodize. Due to the large demand for AFR heads, AFR currently takes 3-4 weeks to build a set of heads. 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. 11/32″ Nail Head Exhaust Valve, 1.880″ x 5.450 Overall Valve Length. Manley 10° Steel Retainers 1.500 O. D x 1.168 I. PAC Racing Spring #1224 1.625 O. Hydraulic Roller, 275lbs on seat. 725 Maximum Lift, Max RPM 6500. 10° 11/32 Valve Locks with lashcap recess. ARP 7/16 Rocker Exhaust Studs. ARP 7/16 Rocker Intake Studs. Adjustable 3/8 Guide Plates. 11/32 Viton Valve Seals. Hardened Spring Cup 1.740 O. D / 1.650 I. Intake Valve Seats 2.450 O. D x 2.000 I. Exhaust Valve Seats 2.000 O. D x 1.580 I. 11/32 Intake Bronze Valve Guides. D x 2.10 O. 11/32 Exhaust Bronze Valve Guides. D x 2.25 O. Specifications, Features, and Optional Supporting Components. Head Gasket, Fel-Pro #1047 (Mark V and VI). Head Gasket, Fel-Pro #1017-1 (Mark IV). Head Bolt Washers, Manley. Spark Plug Starting Range. 121cc w/ CNC Chambers or 117cc w/ As Cast Chambers. Valve Spring Pocket Diameter. 2.380″H x 1.680″W x 11/32 Radius. 1.720″H x 1.920″ W. 24°/4° Intake, 15°/4° Exhaust. 009 per cc/ Maximum 104cc as cast or CNC Chamber. 006 per cc/ Maximum 108cc as cast or 114cc CNC Chamber. Stud Girdle, (AFR Specific). 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. 120 thick intake gasket. We have AFR heads to fit almost every performance application! – UPS Worldwide Expedited – 3-9 days GUARANTEED! (Most Countries, check UPS. Com) – UPS Worldwide Saver – 1-5 days GUARANTEED! We do not lower invoice values since it is a violation of US and International custom laws. Let us work to resolve your problem so everyone is happy. TREperformance 1725 Monrovia Ave. Suite D7 Costa Mesa, CA 92627. The item “AFR BBC 305cc Marine Rectangle Port Cylinder Heads Chevy Big Block 509 2100B” is in sale since Tuesday, September 11, 2018. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts”. The seller is “treperformance” and is located in Costa Mesa, California. This item can be shipped worldwide.
- Placement on Vehicle: Front
- Part Brand: Air Flow Research
- Core Charge: None
- Interchange Part Number: Airflow 2100 117cc
- Manufacturer Part Number: AFR 2100B
- Brand: Air Flow Research
- Warranty: Yes