I'm not saying we are the only Upsolute dealer who can chip all those makes/models, but we have confidence in it since we have experience with those.

A custom program can be done to remove the speed and rev limiter if requested, but not recommended due to safety reasons.

About the power gains after the exhaust upgrade, it should increase more power rather than lose it. Power gains do not add up by each modification done to the car, so lets say a chip adds 12HP and a catback system adds 8hp. The total power gain is not 20HP when a chip and catback done together. It might be around 15HP at peak, but maybe a smoother power curve or there might be 20HP gains elsewhere on the power curve.

Hope the info helps.

Gary