hello i am new to the forum. my friend gave me his 83 320i. it needs a bit of work. I know very little about these cars other than i would like to restore this car. firstly- it has no muffler. nothing from the flange back. this is the last flange...off the middle section. it does not have hangers, etc. all missing a muffler locally would cost me $108.00 w/o hanger hardware. i could get a muffler online for $60.00 and a hanger package for $25.00. is there any reason why a person couldn't get flexible tubing, a high performance muffler, and install this? does it need to be a rated muffler for this particular car? what are my options? thank you