ive got a 97ls thats about to get a manual swap and right now ive just got a muffler on there which sounds perfect not to loud but when i wanna give a hint of power it lets me but anyway i wanna upgrade to a full catback and the n1 and ws come to mind but which one is better performance wise and best use with a turbo and the silencer for the n1 how well does it work

 

are you planning to go ls-turbo, or ls-vtec?

ls-turbo go with the apex n1
ls-vtec go with the apex world sport

apex n1, is too loud for my taste . .
never could go wrong with an apex world sport. quiet and not loud at all, nice low deep tone.

 

The World Sport and the N1 are two totally different mufflers. One is a chambered muffler, and one is a straight through. I don't quite understand your post since your wording is a little jumbled, but are you asking which is better for turbo? You want something with as little restriction as possible with a turbo application, especially when you're making good power.

The only downside is the sound, it will be louder. Don't worry, it won't be TOO loud since the turbo is a large restriction in the system itself.

In my application, I went with the WS. I was turbo, but I was also boosting @ 18psi, so I could afford to lose a bit of top end power. I wanted it quiet, and my WS was REALLY quiet. Sounded like stock.