To state that either head is "not good" is just ludicrous. WAAAAY too many of both heads are part of a proven 300HP+ combo. This horse is beaten to death, but it comes down to a proper combo period. I bet you could take two side by side 300HP combos. One AFR-One TW, switch nothing but the heads between the two cars, and performance may well drop on BOTH cars. That would of course prove both brand heads are obviously bad.
NOT!!!!!!!!
NOT!!!!!!!!