Thinking about a glasspack...

[jhautz]

Originally Posted by Tempted

Those are called "cut-outs" and are utterly pointless on any V style motor without forced induction. A V style engine is designed to scavenge the exhaust puffs from each cylinder and syncronize the two banks for a more efficient, smoother running engine that makes more power. A true performance exhaust system has both banks combining behind the headers by and X pipe for the scavenging effect. You can put cut-outs after the X pipe to decrease the back pressure a bit but you really gain no horsepower. You lose horsepower and efficiency by putting cut-outs on a V style engine before the X pipe. It causes a rough idle and an incurable inbalance in the engine. A forced induction vehicle does not require scavenging as it already has pressure in the intake and has a ton of back pressure in the turbo. Also, most cams designed for forced induction motors do not rely on scavenging and are built with a more aggressive low end powerband.

OK. Not gonna argue it was good. Just loud and fun. lol What the hell did I know I was 17. :)