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Originally Posted by M12LRV
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Are you sure this bolts up to the factory NPP system? It's 3 inch piping and mentions that it mates the the Hooker axle back system. I've never been a fan of Hooker products anyhow so I guess it does not matter. If I'm going to spend that kind of $$ I'm going to get the Borla midpipe. It's 2.75 inch and Borla is top notch quality.
Quote:
Originally Posted by StateOfMind415
Yes, the sound will change. You will get a smoother and slightly louder exhaust note. Sounds sweet above 2k RPMs, while WOT sounds vicious and loud!
The main reason why I choose the borla x-pipe was to delete the secondary cats, while still being able to revert back to the factory x-pipe whenever I need to. I bought high quality 2.75" band clamps that connects the x-pipe to the stock NPP muffler. Also, in Borla's R&D with the C7, they found that 2.75" diameter pipes has better overall performance advantages compared to 3" if your staying relatively stock.
Check out some of my sound clips...
Cold start in Ice/Snow mode:
Cold start in Sport mode:
Highway cruising:
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I like the way it changes the tone. It definitely sounds a little more refined than just chopping off the secondary cats from the stock exhaust. It actually reminds me of how my C5 Z06 and C6 Z06 sounded with the X pipe. I think you've made up my mind. I'm going to go with the Borla midpipe.