I have full akro system with no issues. It pops on upshift with hard acceleration but it idols fine. Gain about 10 hp alsoWhich full exhaust did you put on and are you experiencing any engine performance issues due to no ecu tune ? I have the Akro slip on my 2020 N1k and just got the Akro headers. Want to install them but don't want to cause any problems running the engine without an ECU tune. So also waiting for confirmation of tuners for the 2020 model. .