sleeper exhaust set-up

The Best V8 Stories One Small Block at Time
Questions though. Do they tend to leak at all?, do they actually make power? (and not cause flow probs open or closed?) ,are they legal when closed and a good seal exists. ( I doubt they are legal in any form here in Australia but curious about state laws there) , and can they be fitted easily to any car and be reasonably inconspicuous on 1st inspection?
hehehe...I suppose more than anything I like the idea of switching on a crackly open exhaust at will and switch it off again without any effort.
Questions though. Do they tend to leak at all?, do they actually make power? (and not cause flow probs open or closed?) ,are they legal when closed and a good seal exists. ( I doubt they are legal in any form here in Australia but curious about state laws there) , and can they be fitted easily to any car and be reasonably inconspicuous on 1st inspection?
hehehe...I suppose more than anything I like the idea of switching on a crackly open exhaust at will and switch it off again without any effort.






