AFR Heads, 3575 BBC AFR 377 Heads, CNC Ported, 121cc, Bare

AFR Magnum BB Chevy Cylinder Heads are ideal for large cubic inch combinations (540-615 CID) that are looking for more airflow but want to retain a 2.300 intake valve. This head will also work well on smaller very aggressive applications (489-532 CID) turning over 8000 RPM's. The 377 is very efficient and moves a lot of air early in the curve (415 at .600) making it an ideal choice if your limited to how much cam lift you can run, such as a big inch marine engine with a hydraulic roller cam and a limited RPM ceiling. With close to 440 CFM of peak flow it should be extremely easy to clear 950 HP in a single four barrel aggressive applications and even more in well sorted out combinations (especially with tunnel ram/sheet metal dual quad combo's). The exhaust ports are also notably stronger making the 377 an excellent choice in a forced induction or nitrous car that could benefit from the stronger exhaust flow. Of course the 377cc comes standard with AFRs trademark .750 thick cylinder head deck, reinforced rocker stud bosses, PAC 1.625 racing springs rated to .850 lift, and are equipped with premium one piece stainless steel 2.300 intake valves and 1.880exhaust valves. Standard combustion chamber volume is 121cc for their 377cc BBC.