AFR BBC 325cc Marine Rectangle Port Cylinder Heads Chevy Big Block 540 2101B. This product data sheet is originally written in English. AFR Direct Master Warehouse Distributor – All AFR Products Available. AFR 325cc BBC Rectangle Cylinder Heads. AFR is proud to announce their new BBC Marine Cylinder Head! These AFR 325cc heads are designed feature partially CNC ported intake, inconel exhaust valves, hydraulic roller springs, hard coat anodizing and high quality components throughout. Recommended for more aggressive street, or street/strip builds with displacements up to 540 cubic inches, operating up to 6800 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 # 2101B. 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: 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. CUSTOM ORDER – typically takes 3-4 weeks: AFR# 2101B. 325cc BBC Rectangle Port Assembled w/ Inconel Exh. Hyd Roller Spring, Hard Coat Anodize. 325cc 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. 20% CNC Ported Exhaust Ports 30% CNC Ported Intake Ports. Competition 5-angle Valve Job. 11/32″ Intake Valve, 2.300″ x5.500 O. 11/32″ Nail Head Exhaust Valve, 1.880″ x 5.450 Overall Valve Length. PAC Racing Spring #1224 1.625 O. Hydraulic Roller, 275lbs on seat. 725 Maximum Lift, Max RPM 6500. Manley 10° Steel Retainers 1.500 O. D x 1.168 I. 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. 2.360″H x 1.685″W x 3/8 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. Angle mills might require a. 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. This item is in the category “Vehicle Parts & Accessories\Car Parts & Accessories\Engines & Engine Parts\Cylinder Heads”. The seller is “treperformance” and is located in this country: US. This item can be shipped worldwide.
- Interchange Part Number: Airflow 2101 117cc
- Placement on vehicle: Front
- Brand: Air Flow Research
- Manufacturer Part Number: AFR 2101B
- Part brand: Air Flow Research
- Manufacturer Warranty: Yes
- Core Charge: None