AFR SBC 245cc Competition CNC Spread Port Cylinder Heads Ti Retainers 1139-TI. This product data sheet is originally written in English. AFR Direct Master Warehouse Distributor – All AFR Products Available. AFR 245cc SBC Spread Port Cylinder Heads. Spread port heads have the center exhaust ports spread apart approximately 1/2 over stock GM heads. The reason for spread port heads is to achieve additional cooling in the center of the head where the heat concentration is greatest. As standard headers do not fit, spread port headers are required since the center ports are spread further apart than stock GM products. The increased spacing on the exhaust port also requires the use of exhaust gasket Fel-Pro #1409. Spread port heads only come with a Stahl bolt pattern. AFR’s spread port head has all the benefits and features of AFR’s standard head. AFR Part # 1139-TI. 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 Best 23° AFR Head Ever Produced! AFR is proud to introduce the new 245 NPP (no pushrod pinch); best suited for max effort applications, but larger displacement 427+ pump gas engines could consider this head as well. This exciting product represents the best flowing 23° SBC head to date and while flow numbers may reflect a very good 18° head of the past, this head is still a conventional direct bolt on non-raised runner intake port configuration. It will drop on your 23° shortblock as easily as the 227cc or 235cc AFR SBC product and in fact shares identical valve centerlines and rocker stud locations to both of those heads. However, unlike the 227 and 235 cc heads, this product will not accept stud mount style rockers and a shaft mount rocker system with the proper intake offset must be used. This is primarily due to the enlarged and widened pushrod pinch removing that checkpoint in the entrance of the intake allowing AFR to design a port with a more direct shot at the back of the valve that also has a more consistent cross sectional area and velocity profile. In addition, this head comes standard with a 3/4 inch deck, 2.125 intake and 1.600 exhaust. Dual valve cover bolt pattern is standard. Note: 2.125 valves will require aftermarket pistons notched for valve clearance. CUSTOM ORDER – typically takes 3-4 weeks: AFR# 1137 – 245cc Competition Heads, 70cc, NON-emission AFR# 1138 – 245cc Competition Heads, 80cc, NON-emission. AFR# 1139 – 245cc Competition Heads, 70cc, Spread Port, NON-emission AFR# 1140 – 245cc Competition Heads, 80cc, Spread Port, NON-emission. Due to the large demand for AFR heads, AFR currently takes 3-4 weeks to build a set of heads. 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-angle Valve Job. 8mm Bead Lock Intake Valve, 2.125″ x 5.00″ long. 8mm Bead Lock Exhaust Valve, 1.600″ x 5.030″ Overall Valve Length. PAC Racing Springs 1.550 OD Solid Roller Dual Valve Spring Pac #1225, 250 lbs on seat. 10° Titanium Retainers 1.490 O. D x 1.115 I. 10° Bead Lock Valve Keepers with lashcap recess. Hardened Valve Spring I. D Locator 1.550 O. Ductile Iron Intake Valve Seats 2.200 O. D x 1.750 I. Ductile Iron Exhaust Valve Seats 1.696 O. D x 1.325 I. Specifications, Features, and Optional Supporting Components. 2.200″ H x 1.300″ W 7/16 Radius. 1.465″ H x 1.570″ W. Valve Cover Bolt Pattern. Valve Spring Pocket Diameter. Max Valve Spring Pocket Machining. 006 per cc 60cc Maximum. 009 per cc 55cc Maximum. Minimum Cross Sectional Area. Note: Angle mills might require a. 120 Thick intake gasket. Shaft Mount Rocker Arms. 550 offset (with standard lifters). Intake Gasket 1.280×2.090 w/ 3/8 radius, Fel-Pro #1206. Exhaust Port Gasket, Fel-Pro #1409. Head Gasket, 350cid Fel-Pro #1004. Head Gasket, 400cid Fel-Pro #1014. Head Bolt Washers, Manley. AFR Titan TXR #4801. AFR Titan TXS #4802. Spark Plug Starting Range. 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. 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 is primarily due to the. The item “AFR SBC 245cc Competition CNC Spread Port Cylinder Heads Ti Retainers 1139-TI” is in sale since Tuesday, October 2, 2018. This item is in the category “Vehicle Parts & Accessories\Car Parts\Engines & Engine Parts\Other Engines & Engine Parts”. The seller is “treperformance” and is located in Costa Mesa, California. This item can be shipped worldwide.

• Warranty: Yes
• Interchange Part Number: CNC Ported
• Placement on vehicle: Front
• Interchange Part Number2: 70cc chamber
• Fitment Type: Performance/Custom
• Brand: Air Flow Research
• Material: Aluminum
• Manufacturer Part Number: AFR 1139-TI
• Country/Region of Manufacture: United States
• Interchange Part Number4: 100%
• Interchange Part Number5: Small Block
• Part brand: Air Flow Research
• Interchange Part Number6: Chevy
• Interchange Part Number3: Fully
• Core Charge: None
• Unit Type: Small Block Chevy
• Interchange Part Number1: Airflow