Ok did this yesterday, not sure if it had a great improvement in torque, since maybe the newer Jardines for the 2009 are a little smaller, there was no way mine was 2 5/8's ID like stated in the 1st thread, it was 52mm, thats just over 2" in my books, and when done i got down to 42mm at the cone end
I welded mine to the header, so didnt have to pull my pipe apart
One thing i did notice is it cleaned up a alggy area between 1000rpm and 1500rpm, was sort of a flat area, not i can short change to the top and load up with low revs, it also cleaned up 50% of the popping on back off