Magnaflow Exhaust
 

I found the cheapest full cat back for the car on bestmagnaflowsource.com type in part number 16798 and its a 2-piece cat-back for the XD, i spoke to a representative from magnaflow and they told me it was the first full cat back system available for the car....MSRP 729.99 the website i checked....499.99 I think investing in the full cat-back as oppose to the axle-backs which cost almost the same would be very wise.