Went into town today to pick up a sheet of ply for the interior side panels for the van and it was too long to shut the top tailgate so I had to drive all the way home with it open. I'd had the exhaust fixed last week and it's now exiting at the left hand rear corner instead of out the back. I had my windows up and the aircon on, and had no fumes at all come inside. NONE! I was very surprised (pleasantly) about that.