On street tires, I ran a 14.04 and a 14.12. I have a rcsb with an ls1...the cam is upgraded to the ls6, it has a built tranny with an extremely loose vigilante stall converter. I am taking this out next week to install a 2500, right now it footbrakes 3200 so its stalling kinda crazy...it has just has a rough tune in it now, we will be tweaking it when we change the converter. Other than that, everything is stock down to the air filter.