I have been reading through some posts on this and I have some questions. First off I want to let you know I have an '01 LS.

1) Why do a lot of people say the JRSC is a waste of money for the LS?

I am not looking at building a faster quarter mile car. This is my daily driver and I just want more power out of it. It feels too weak for me.

2) If I add a SC will I also need others mods such as an intake, headers or exhaust?

I want it to be as quiet as possible. Thanks!