I have been stressing about this ever since I got the car more than a year ago and now I'm starting to feel people think I'm crazy lol. I have a 2010 SES 2.0L with Street Exhaust from FSWERKs and K&N now. The issue is the car feels like its constantly bogging. It hates to start cold (but does it with no problem) and jumps in RPMs and fluctuates expecially with the A/C on. When hot at a stoplight the RPMS don't stay still and jump up and down from 400-600 RPM constantly and it vibrates the whole car. It also does't like to go in its final OD gear when cold and stays at 2,000 RPM until warm. Also when shifting its always looking for a gear and I have to let off the gas a bit to allow the car to shift so its not stressing in RPMs. I took the car when it had warrenty and they replaced the motor mount when I didn't have the mods. Recently I took the car to a local mechanic (throwing no codes) and I was told that its how the car was built. Is this true?