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As I posted in the introduction area, I'm a new owner of a 2014 Z51. The car has an aftermarket Borla exhaust that the dealer didn't know much about. The car runs and sounds great, but I haven't been able to drive it much due to inclement weather. When I had it out on the interstate in touring mode, there was a noticeable sound of a valve opening and closing at different speeds. So I've worked out that it is the NPP system which I've not had before. I'd be interested to know anything about this, was it a drop-in cable hookup or was an additional controller needed? Also can this system be identified and/or cost of the exhaust system upgrade be approximated from photos? Any info would be appreciated.
So I presume this is one of the AFM/NPP Valved Exhaust Systems for the C7 with classic intercooled tips. Not sure if it's cat back or axle back? I'll experiment with the different ride control modes the next time I'm on the highway and make some observations. Anything I should be particularly concerned with or aware of?
I had a Borla S-Type Axle back system installed on my 2019 Stingray. Borla builds them specifically to work with the factory NPP system. if installed properly, there should be no difference in the way the driving modes operate. I do not hear any valves opening and closing while driving. In addition, at least for the axle back system, the installation has no impact of the factory warranty (except of course for the exhaust system itself). I have that in writing from my Service Director. You should consider yourself lucky to have the system. Mine cost $2,500 installed. Devnull is the Borla expert on this forum. Perhaps he will chime in or you could shoot him a PM.
Last edited by ShadowGray19; 05-15-2019 at 07:56 PM.
Why not go to the source; contact Borla (and/or their Website). Talk with them about the particular "system" it seems to be. Also, I'd think a perusal of ads for various systems from assorted vendors might give you some info about what you actually have. Doing thusly often gets me straight answers pretty easily.
05-12-2019, 12:03 PM
Borla exhaust on used C7
