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I think I have the same problem with the exhaust valve controller box. The exhaust only flows through the outer tips on each side regardless of engine mode or rpm. There is also no difference in sound in different engine modes.
How did you get in touch with Akra? I have registered my product and emailed them more times than I can remember and they have never responded to me.
I asked the shop that sold it to me and they are suggesting that I remove the modules (electric motors) and try to activate while not installed to ensure they are working independently of the exhaust system. I’m not really sure how I would do that.
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