So do we have enough displacement and cam with factory heads and intake to fully use 1 7/8” primaries ? I’m not into racing anymore so I don’t know how the Hemi reacts to those. I’d think the larger primaries combined with a low rev motor (factory cam literally dies past 5200rpm?) and a truck intake promoting low/mid range flow should hurt performance mid range. is there enough scavenging to use the larger primaries with a factory truck cam/heads/intake?
I don’t know how the Hemi reacts to exhaust changes but I’d think I’ll want 1 7/8 primaries on a 6.4hemi and 1 3/4 on the 5.7l engine unless the 5.7 had ported heads, ported intake and monster cams?