Quote:
Originally Posted by Chutzpah
I’m glad I went with a simple non NPP Corsa sport axle back, nothing more. The back and forth seeing what sounds good, aftermarket rattling valves, combined with the added cost(s) and wasted time, would have driven me nuts.
I’m happy with the reduced rasp and smoothed out tone of the firecracker pops.
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After 2 different brand NPP exhausts, 2 replacement Corsa NPP mufflers under warranty, all due to rattling valves, I went to simple Corsa Sport Non NPP and couldn't be happier. Not as quiet as Corsa NPP when closed, but not nearly as loud and raspy when open. It's perfectly fine and livable for a weekend toy. If it was a daily, I would probably want the NPP function, but nobody makes a good NPP valve that doesn't eventually rattle over time. It's not some crazy loud rattle just enough to piss off those who are sensitive to that type of stuff similar to interior vibrations/noises.