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Thought I would notify all the 4.2 Supercharged guys and gals about this company I came across. The Cats/Downpipes were built for the STR, but we share the same part# if you wanted to replace with OEM, so they will work for us as well. And the price is fantastic for a OEM install and not chopping up your existing exhaust.
You might as well and install the O2 Simulator, mini catalytic Converter cel fix 90* downstream 02 sensor extenders to keep from popping the p0420, p0430 cat inefficiency codes that usually comes up a year later. And when i tested a set on a xkr they were worth 25hp to the wheel. So not a bad improvement for the money
I wasnt talking about the mini cats but the 90* extensions that move the 02 out of the direct exhaust stream giving a much wider range before you would ever get a cel for cats. It is usefull also for codes that are present and have seen them never come back
When someone install 200cell sports cat. Usually install minicats to prevent O2 check engine light (because stock CATS have 600cell . therefore Rear O2 sensor detect different voltage from two cats )
Stock XF's O2 sensor is installed in the middle of 600cell stock CATS.
If you install O2 sensor to the end of upgrade 200cell CATS. the O2 sensor location can compensate role of 90 degree angled O2 spacer(minicat)