i recently installed a 'chambered' exhaust system on stock 69 z. question: it seems to quiet- do they get louder after 'breaking in'- or should a different muffler be installed along rear-end ***.? like a flowmaster? I am looking for a raspy,mellow tone. thanks!
I have chambered exhaust on my Z28 and my brother had it on his (that he bought new in 69). I've never know them to get louder with time, unless a hole develops somewhere. You should have a moderately loud result. Where did you get your system, is it steel or aluminum?