XR6 or XR8 as they are different to allow for the dual exhaust on an XR8?
Normal XR6 you can get one new from Ford for around $200, part number 8R2Z 17866 CC
https://www.ebay.com.au/itm/Genuine-...frcectupt=true
XR8 one is more around the $500 mark, part number 811J 17866 AA. (Nothing on Ebay)?