APC9199 wrote:
I suspect this would be money well wasted. You'll get almost no noticeable effect on an idling engine when the EGT's are low.
The better bet would be to get a proper tune (Green Diesel Engineering is the go-to for engine tunes) to get the engine running as efficiently as possible across all engine RPM's. The GDE eco tune would give you better mileage, power and emissions all at thre same time, and likely reduce your exhaust smell SOME (not sure how much). I really don't think a CAT is going to do what you want it to.
GDE themselves don't seem to be a fan of removing the cat:
GreenDieselEngineering wrote:
The backpressure on this vehicle is sufficiently low that we could not justify the expense of aftermarket exhaust and removing the catalyst makes the exhaust smell bad.
source:
http://www.greendieselengineering.com/jforum/posts/list/8.page#p127