$600 to spend and ive decided to go with a nice catback, i want to go slp loudmouth and the slp ypipe, now i no this system is loud but its not droning loud unless you get the headers right. i went on ls1sounds.com and saw a guy with just the slp catback and y pipe and it sounded amazing will the y pipe add much sound and hp or no?

 

i'm interested to find out the answer to this question too! haha

 

ive heard one z28 with headers and lm but it wasnt as loud as people say but i have heard just lm and its loud so i dont know

 

i had just LM with stock manifolds and y-pipe for a while and it sounded pretty good, not to loud but definately a head turner.

now i have headers and a catted y and it is really alot louder, people outside my house can hear me when i enter our neighborhood