i was interested in getting a new muffler for my 2006 cobalt ss supercharged. I was looking at the Borla mufflers but i wasn't sure which one will fit. im pretty sure the inlet and outlet diameter is 2.25". which model number should i pick. thanks for the help.

http://www.borla.com/products/product_multi_detail.aspx?cat=2&type=43&desc=Unive rsal+Mufflers%2c+Tubing+%26+Hardware|Turbo+Muffler


Shawn