Paul Stewart

I just picked up a 2013 GT/CS. The owner did the following:
85 MM TB
Rousch Cat Back Exhaust
AEM Intake
Ford Performance Springs, lowered 1.5"
20 x 8.5 Shelby Rims

The car is a 6-spd Auto, with 3.15 stock gears. Not trying to get crazy or anything, but to get into the low 13's or high 12's would be fun!!!
Let me know and thank you for any advice!

outceltj

torque convertor

Dino Dino Bambino

Plus 3.73 axle gears, and rear LCAs to reduce wheel hop.

Paul Stewart

From what I have read on here from other members, anything above a 3.31 on an automatic would hurt the performance and I don't want to void any warranties as well. I am going to purchase the Ford Performance Shocks/Struts along with both front and rear sway bars. In addition, the upper an lower control arms...................

outceltj

Not sure as to why a gear swap to 373 would hurt the performance. Installing a torque convertor shouldn't create any issues and if there was they would have to prove it was directly related. I have never heard of anyone installing a torque convertor and then having issues. Is the car tuned? IM guessing it is with the TB. If so then you shouldn't be worried about warranty. To get into the 12s you need to add some torque