Well i just installed a new exhuast, a new muffler and tailpipe, I installed a flowmaster super 44 and a 2.5" tailpipe, when i stop and rev the engine, some strange smell fills inside my rig could it just be stuff burning off from the new muffler and tailpipe and will go away onces its fully burned off?

 

More than likely just burning stuff off. If it smells like a rotten egg it's your converter, also common if it's new.

 

I would say that is it....but you should make sure nothing is laying against the exhaust system or to close to it.

 

well it doesnt smell like rotten eggs, nor does it smell like an exhuast but it does smell like *****, and it didnt start doing it till i put the exhuast on so im going to assume thats it then

 

I just replaced my cat and muffler and have the same thing. look under the car and see if you see anything. I could see stuff burning off the muffler itslef (saw smoke) and off the cat. I think there was a sticker on it and maybe some other residue, etc. I'm just going to wait a little bit, I'm sure it will go away... but if it's filling the cab, make sure you don't have an exhaust leak.

 

definately this. there's usually stickers they wrap around the new parts too

 

Its all the packing oils and greases that are on the new parts will go away after a few hundred miles id say

 

This. Mine is the same way. It usually doesnt last too long. Maybe a week or so.