AFR Direct Master Warehouse Distributor – All AFR Products Available. AFR 305cc BBC Rectangle Cylinder Heads. AFR’s 305cc rectangle port heads feature partially CNC ported intake, exhaust & chambers, A356 aluminum castings 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 # 2100-1. 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. The Ultimate Race/Street Weapon! For the ultimate in “Rectangle Port” performance, available in partial or full CNC ported, AFR 305 has no competition. With flow figures most small to medium sized rectangular port castings would be envious of, these high flowing “Rectangle” produce tremendous airspeed and really pack a punch. Premium hardware all come as standard equipment. Take note the higher flowing exhaust ports are raised. 375 over stock location, and therefore these heads might not be a direct bolt-on in every application. These heads have no EGR and are not emissions legal. 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: AFR# 2100 – 305cc Heads, Rectangle Port, 117cc Chambers, Partially Ported, NON-emission AFR# 2100-1 – 305cc Heads, Rectangle Port, Full CNC 121cc Chambers, NON-emission AFR# 3050 – 305cc Heads, Rectangle Port, 117cc Chambers, Partially Ported, No Parts, NON-emission AFR# 3050-1 – 305cc Heads, Rectangle Port, Full CNC 121cc Chambers, Partially Ported, No Parts, NON-emission. 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 100% 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. Solid Roller, 275lbs on seat. 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 Rectangle Port Aluminum Cylinder Heads Chevy Big Block 509 2100-1″ is in sale since Wednesday, January 20, 2016. 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 2100-1 121cc
- Manufacturer Part Number: AFR 2100-1
- Brand: Air Flow Research
- Warranty: Yes