STOCK AFR BBC 300cc CNC Ported Magnum Oval Port Aluminum Cylinder Heads 3670. This product data sheet is originally written in English. AFR Direct Master Warehouse Distributor – All AFR Products Available. AFR 300cc BBC Oval Cylinder Heads. AFR’s 300cc heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for aggressive street, street/strip or race builds with displacements up to 540 cubic inches, operating up to 6800 RPM. Component upgrades and machining options are available to customize AFR Heads to your specific build. AFR Part # 3670. 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 Street Weapon! For the ultimate in “Oval Port” performance with hydraulic roller springs, the fully CNC ported AFR 300 has no competition. With flow figures most small to medium sized rectangular port castings would be envious of, these high flowing “Ovals” 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# 3670 – 300cc Heads, Oval Port, CNC 112cc Chambers. Roller Springs, NON-emission AFR# 3680 – 300cc. Heads, Oval Port, CNC 112cc Chambers. Due to the large demand for AFR heads, AFR currently takes 3-4 weeks to build a set of heads. 100% CNC Ported Exhaust Ports. 100% CNC Ported Intake Ports 100% CNC Ported Combustion Chambers. Competition 5-angle Valve Job. 11/32″ Intake Valve, 2.300″ x 5.500 O. 11/32″ Nail Head Exhaust Valve, 1.880″ x 5.450 Overall Valve Length. PAC Racing Springs#1940 1.550 O. Hydraulic Roller Dual Valve Spring, 175 lbs. 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. D Locator 1.550 O. Intake Valve Seats 2.450 O. D x 1.950 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. Gasket #107 or GM #12366985. 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. 112cc with CNC Chambers. Valve Spring Pocket Diameter. 2.055″H x 1.840″W x1/2 Radius. 1.770″H x 2.010″ W. 24°/4° Intake, 15°/4° Exhaust. Angle Mill (Milling options available) 97cc max. Flat Mill (Milling options available) 102cc max. 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. This item is in the category “Vehicle Parts & Accessories\Car Parts & Accessories\Engines & Engine Parts\Other Engine Parts”. The seller is “treperformance” and is located in this country: US. This item can be shipped worldwide.
- Interchange Part Number: Chevy, Fully, 100%, Big Block
- Placement on vehicle: Front
- Fitment Type: Performance/Custom
- Brand: Air Flow Research
- Material: Aluminum
- Manufacturer Part Number: AFR 3670
- Part brand: Air Flow Research
- Manufacturer Warranty: Yes
- Core Charge: None
- Unit Type: Big Block Chevy