I just installed an MRT catted h pipe the other day and I'm satisfied with the sound, but had a question which seems kind of important.

When im in the car, i can smell some remnants of raw gasoline or something that smells very similar. . its usually when i put theair on inside. Since its a catted h pipe, shouldnt i not smell gasoline coming from the exhaust, and even if you can still smell a little unburnt gas coming out of the tail pipes, how is it getting into my car when the windows are closed. I dont think i have an exhaust leak, i already checked and it seems fine.

I had a thought that It could be the lead on the passenger side gasket melting from heat. The stock one when i took it off had no lead on it so i'm assuming that when heated, the lead drips into cracks and crevices to make a seal, and the rest burns off, and over time the smell goes away.

Its a very hard smell to describe but kinda smells like ozone mixed with gasoline fumes. Any ideas on what this could be? a problem? or just normal for a high performance catted midpipe?

Id call Dan Garn at MRT, Im sure he'll help you out or get w/ his techs. My thought is exhaust leak fr either your headers or cat back at the midpipe ifyou can smell it in your car.I also Know when I put my midpipe in it smelled odd until it burnt the coating/paint off. I've never smelled a brand knew mide pipe with cats, you'de think it would smell tolerable. I know mine smells like chalky fuel when in the garage. I have no cats.
Is your o2 sealed all the way. It sounds like your car is running rich. Is you stang tuned ??

no its not tuned at all, i figured someone with my mods wouldnt need a tune

Sometimes when people tune them themselves, they don't do it correctly. I had orgianlly a diablo and I screwed around w/ the lean rich tables. WHen I went alittle rich in the upper rpms my car smelled exactly like yours. You have enough to do tuning . Tuning always max your HP safely. When my car a NA, I had a widebane tune to it and got 256 rwhp out of it. Just to make you laugh, when I tuned my car and played around, I went thru 4 o2 sensors. SO, I know mistakes. Again, I know dan Garn at MRT , call him and he may steer you in the right direction. SOunds like a exhaust leak off you midpipe.

yeah it turned out to be a leak. the flare on the pipe that met up with the manifold was too big so it needed to be ground down to make a better seal. its all good now. thanks