The sound of the NPP over the stock is way better, and I don't really want a really loud after market exhaust bc I just bought the car and have extended warranty. I figure I stick with GM parts they won't hassle me at all. (not that they have the right to if its just exhaust, but i dont feel like even arguing) A used NPP is easy to find and also is much cheaper than getting some new after market stuff.
Having the ability to close them would be nice, but if its all kinds of extra work, i dont really care.
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