2 weeks ago Borla used my white IS for their prototype exhaust. It has a 4" oval tip with the last one inch gold anodized. The same tip as they use in the Jag exhausts. They use 2.25" pipes with a resonator like the stock exhaust. It is too quiet for me, si I'm taking it back soon to have the resonator taked out. It gaioned 5hp and 4tqe. I will post the pics and the dyno graphs in a few days. A professional photagrapher took an hour's worth of publicity pics also.