Any remedys to a plugged Catalytic Converter?
 

My friend has a plugged cat but doesn't have the money to spend on a new one right now. Any ideas on how to fix it or help it right now? It's a 2001 grand prix. I heard somthing about drilling holes. Thanks a lot.

RE: Any remedys to a plugged Catalytic Converter?
 

How have you determined that the cat is plugged? If you unbolt the down pipe from the rear exhaust manifold and the car runs well, then you have a plugged cat.

As far as how to fix it... Well, buy a universal high flow cat (magnaflow or catco) and bolt it in! Should be able to do that in your driveway for $50-70 depending on where you get the universal cat from. You just have to measure the pipe. If your friends Grand Prix has the 3.8L, then I believe it is a 2.25" in-out cat, but measure it first just to be sure. If it has the 3.1L, then it's probably 2" in-out.

*EDIT* The MagnaFlow universal cat is $64 on SummitRacing.com
The Walker universal cat is $54 at Advanced Auto
Direct fit MagnaFlow is $179 at Advanced Auto

If you wanted to truely do it in your drive way without modification to the stock exhaust, I'd get the direct fit and some new bolts.