ok so i got the dynomax super turbo installed the other day

but now there is a strange smell to it!!!
is this normal????
if so how long will it last?????

That's normal. It's just the oil on the metal pipes burning off. Sometimes there is also some excess lube if you have a mandrel bent setup. I know the Hooker cat-back I used to have was real greasy.
It shouldn't last for too long. Depnds on how much you drive it.

cool thanks