I have a Manual.
Really Prodigal sums it up. i was gonna use the term more "Punchy" feeling. Also have the Steeda 2 piece rotors to install, continue to shed some weight.
Maybe late to the post, but wanted some high speed road miles before reporting. Just finished my QA1 CF install few weeks back. Just had a road trip with some high speed runs and no vibration. Next is some exhaust work and Steeda 2 piece rotors.
Maybe others will provide more opinions. But headers was not for me. It was a lot louder in all modes and very raspy sounding to me. After 100 miles I took them off and went back to stock. I had factory resonator with and without headers.
Here is mine I made up. Made in Excel. its just 8.5 x 11. laminated and in a clear plastic holder. I just put it under my wiper to display some info. Will have to update this spring.