The CAT on my plus 4 still stinks with 47 k on the clock, but only after pushing hard or blasting up steep hills.. It’s a sulphur type smell and I often think that the stories of fumes from the exhaust are more related the cat.
Yes that's how to describe the smell - sulphur like. I guess it is the CAT then - does that mean it's faulty or leaky or is it just a "feature" or "factory specced optional extra"
I'm 99.9% certain it's not fuel. I had a Westfield (built by me) on the road for 20 years with a 1600 xflow in it - I'm familiar with the smell of fuel in the cockpit
