which pipe?? I know that the cat back (extension or connecting pipe
they are called) can be had in most aftermarket manu. "economy"line &
you can get them pretty cheap. The front pipe (from the motor to the
cat) might be a different story. Check at the local parts houses like
auto zone or advance or whatever is in your part of the world. Make
sure you don't pay top dollar for the same stuff that you can get cheap
elsewhere. It will pay you to do some price shopping if you really
wanna save a few $$. good luck.