Originally Posted by DanielC
You are going to get a lot of theory, and ideas on this, and some of the advise may actually be true.
But with so much misinfornation existing, and being reproduced by people on the web, the only way to know is to spend lots on time on a chassis dyno, with different exhaust configurations.
yea i can understand that .
but i cant remember if the larger the exhaust is for top end speed or low end tork.