FULL DYNO RESULTS340 PROMAXX VS 345 AFRCHEAP VS BRAND NAME? CHECK OUT THIS VIDEO COMPARING THE FULL CNC PROMAXX 340 BBC HEADS AGAINST THE ASCAST AFR 345 HEADS. WE TESTED BOTH HEADS ON A 11.0:1 572 BBC STROKER EQUIPPED WITH A SOLID ROLLER CAM, MOROSO OILING SYSTEM AND SUPER VICRTOR INTAKE. BOTH HEADS PROMISED 800 HP AIRFLOW NUMBERS. WHO DELIVERS, AND AT WHAT PRICE?