If you want a big muffler, I'd go with the GT spec... it's got a presilencer (unlike the Corksport) and looks better than the N1...

Also, there is a variable-sized silencer insert for the tip of the GT available... it keeps the car quieter at low-throttle but when you thrash it it opens up to let the exhaust out much more easily.

 

I forgot to mention exact specs for my system.
Racing beat 2.5 downpipe and presilncer. The corksport is the 2.5 to 3inch system.

My thought is this may amplify the corksport problem because it's like a megaphone. Also when I was using a high flow cat it was very similar in noise level.

Now on a positive point.
It is put together very well. It's lasted me 3 years of daily driving and the only part to break was the Corksport name plate on the canister(sitting on the highway some where now).
It's weight isn't that bad.

The noise could be dealt with by adding a muffler inline.

It woudl be fine for a track car since noise level doesn't really matter. If you end up going the illegal street drifting/racing way then get something quieter or the Cops will easily find you.