They had 2 of them last year at the local Nissan dealership. They were using the lifts and working on both cars their before the race.

 

I would guess something close to a straight pipe, that is very similar to how my car sounds at WOT.

 

Man, I would love to do that! Reminds me of when I raced my Ranger on trails power sliding it and all. Or, Jumping my Jeep.



However, I think I would strip out the rear wheel wells and install some plastic linings to help with the rock noise. That was just painful. I had to put undercoating in my rear wheel wells just cause I didn't like the sound of pebbles hitting stuff in those rear wells.

If I move to Denver. I'm going to do that. I wonder if they are using studded tires or just mud and snows......

 

I only live 20 min from that road, now I feel motivated to go, shame its covered in snow