Classic Chambered exhaust?

[DJ Mabe]

Has anyone dynoed these mufflers and compared them to the Flowmasters or any of the other standard mufflers? I am currious how these things flow. I like the sound but, I don't want to give up any power just to have a different sound. I know some guys on here have run these and if you could chime in with some knowledge it would be much appreciated.

[vintageracer]

Same OLD technology used as used in Corvette sidepipes. Chambered exhaust has been shown repeatedly in 65-67 Corvette exhaust tests to kill HP. They sound OK but are NOT HP friendly.

There are much better choices as far as HP is concerned.

[DJ Mabe]

I have Flowmasters on now but I like the sound of these mufflers. I'm not willing to give up ponies for a little nicer note. Not a lot of ponies anyway.

[pdq67]

I honestly think that no more than W/D/T, smooth perforated inner pipe glasspacks will perform better than the GM chambered pipes..

Noise level AND sound that people like is another matter..........

pdq67