AFR 265cc Oval Port Magnum BBC

Small Port, High Velocity, Torque Monster

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Want to wake up the Big Block in your favorite tow vehicle? AFR’s partially CNC ported 265cc high velocity oval port is just the ticket! They are also ideal on smaller cubic inch street performance applications (396-468 CID), providing “gobs” of bottom end torque, tremendous throttle response, and great all around power. With AFR’s trademark 3/4” deck, reinforced rockerstud bosses, and thick rugged castings, you can own the strongest and most efficient heads on the market today. Premium hardware such as 2.19/1.880 one piece stainless valves, 1.550 double springs, 10 degree locks and retainers, and high quality studs and guideplates 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.

 ****Base price reflects Hydraulic roller spring, Head Part number 3610****

Note:

Optional stud girdle required for 2° rolled valve angles and 1” longer head bolts needed on four bottom exhaust bolt holes.

(see footnotes here)

265cc Partially Ported BBC with 100% CNC Chamber Flow Chart

Tested on 4.310 Bore

Note: Milling head deck will affect flow numbers. Angle mills might require a .120 thick intake gasket.