I would like to compose a list of known muffler (and cat. converter) part numbers that people have used on their Bonneville- since when you go to websites and put in our cars they dont come up. Also what modifications if any had to be done- for example if the muffler originally was made for a camaro and in order to use it you had to flip it, etc...

Oh, and could one of yall experts tell me is there a definitive awnser to the question: what is the size of my stock exhaust? Sure looks quite big but I want to be sure I get the right muffler.

stock piping is 2.5

what about tailpipe diameter out the muffler?

2.25

well theres a good start

so to keep my stock tips I would need a muffler with 2.5 inlet and 2.25 outlets. threads off to a good start, now even without part numbers I might can get some kinda useful info from online muffler catalogs

get a 2.5 in/out cross flow F body muffler

80 series-42583 2.5/2.5

Check out these previous discussions on the subject:

http://www.bonnevilleclub.com/forum/...040&highlight=

http://www.bonnevilleclub.com/forum/...205&highlight=

I did mine several months ago and my muffler is a magnaflow 12266

I got all of my parts from www.hottexhaust.com

haha nice finds, and to think I actually searched and couldnt find ****