Quote:
Originally Posted by sirroderick2
2017 V6
Manual Transmission
Performance exhaust
I have this issue but coincidentally I only started hearing the noise after about 4,000 miles. In addition after I shift into 6th my pipes shut completely off, as if you can't hear them. Also sometimes in 4th/5th the pipes go in and out. Dealership put a complete new exhaust system and noise got a little more quiet but the pipes still cut off in 6th. Any advice? Thanks
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Pull the fuse.
Even in track mode the NPP will shut at predetermined speeds.
Example, fifth gear at 40mph.
Above 40mph NPP is open and exhaust is loud, below 40mph the valves close and the exhaust is quiet, I guess to prevent low speed drone while in traffic.