exhaust diameters

I have a 98 GTP and it has the original exhaust tips. What size diameter are the stock tips? I wanted to buy some tips like Big L has. I think they are these... http://www.pfyc.com/store/merchant.mv?Screen=PROD&Store_Code=PFYC&Product_Code=GN5003&Product_Count=10&Category_Code=GPEXH

If you mean the ones like these? There 3", but can be fixed to your mufflers.
http://img.photobucket.com/albums/v425/kustomkid54/JimsGTX1.gif
They are nice tips. You will enjoy the way they look.