[elhigh]

Security hamsters won't allow pictures to come up on my computer at work - I'm here on my third Saturday in a row, I'm starting to burn out with these six-day weeks - but if I recall correctly doesn't the 360 have an aircooled engine? If so, then maybe your exhaust smell is coming from a bad engine pan seal?

VW Beetles have this plate all the way around the bottom of the engine compartment, and it's removable and has a seal to keep it pretty much airtight. If the seal's cracked or missing, hot air that's been blown out of the engine compartment can leak back in, causing overheating and exhaust infiltration. How that would make it into your passenger compartment is a bit of a mystery.

Hey, there's a thought - VW heaters were air-to-air exchangers on the exhaust system. If that's like what's on your Subie, is one of those leaking? If it is, that'll get a lot of exhaust smell into the passenger cabin really fast, and going faster just makes it worse.