Hi 77YODER & welcome if I havn't already greeted you! You are looking at quiet a bit more money for the applications you mention. The best headers you can install are the TRD headers, which may go for $600 minimum unless you can find some used or on E-Bay. Other than that, I hear
Downey headers are ok if you get the exhaust flanges machined, but you may need a
cross-over pipe for the complete install.
I'm sure I'd love your truck because I have a '99 just the same as you. I love black and the wheels that you have are awsome! How about some pics!
Oh, as far as after the Cat, just find a reputable muffler shop to install the after-market muffler of your choice(2.5 inch pipe) and you're looking at $200. Many here favor the Flowmaster 40s & 50s. I hope this helps. Bray [img]/ubbthreads/images/graemlins/40BEER.gif[/img]