I run a G29 with a Bartolone Torpedo pipe in the 5sc. The combo gave me so much torque that I had to gear up, as all I was do was spinning. I now run 19/55 and you can see in the video I still have loads of low end. Skip to about 2:00 into the video to see me going up a steep hill with no issues.
https://www.youtube.com/watch?v=sDq409_On0c