^^ my friend did it for a 6 pack of beer and the girl at pep boys rang up the cuppler as the hole pipe and cuppler. then i returned the cuppler and basically got a free mod but Midas quoted me at 120. the inside is fine you feel a little vibration in the seat but thats about it. and with the windows up and the music at like half volume you can barley here it. but windows down is a completely different story. you can also here the turbo out of the exhaust more but do it im loving it and it causes less restriction and that must make like 2-5hp somehow.

 

Remember 2-5 Hp with a tune only, if at all! But i'm thinking about the same thing, but I think a DP and muffler delete would be to much for my taste.

 

if you have a cat it wont be too bad but it will still be loud. if you go catless and no muffler you will get pulled over for it