Hello all. I couldn't really find any info on this. I bracket race my 2016 Mustang GT A6 on weekends throughout the summer. I currently have 3.55 gears with just drag radials. My question is: if I go to 3.91 gears, will I still be able to stay in 4th gear when I cross the finish line/traps? What about if I add CAI and Catback as well?