Thanks, gentlemen. Well, I must admit I'm still a little confused. Bigger heads, pistons, and breathing better allows for a bigger 'explosion' in the cylinders, better intake and exhaust, thus giving more hp. Right? So, what gives the engine torque? I understand 2DEUCE, that a bigger combustion crates more power to turn the engine, thus increasing torque. Right? So, when modifying an engine, which is more desired? Going on what HIPPO stated, with a bigger engine at higher rpms, hp is increased. So, why does the engine lose torque? It seems that it would be a direct correlation. Just going on limited knowledege on the internal combustion engine and physics. J.T.