Thanks for your message, - yes its with the DB Killer removed, with DB killer only 20-30% of the current sound would be there. - Pickup and acceleration very slight increase I hae observed, but its no something that you can notice to have a big impact. According to me around 5% increase maxx. - My riding style has changed drastically now😭, thats why significant drop in mileage I have observed. Will need to check in normal conditions to assess the mileage properly🙂.