
I had good results on the dyno with a pair like this, I'm going to try them again with the larger diameter downpipes that I got last year. With a 600 conversion and an HRC cam they are best described as 'rorty'.
I have a set of standard 1986 silencers in the garage, not been used since 1986, the chrome has a lot of light pitting but otherwise I think they are good. I'll have to have a look at them when I get a chance, sounds like they may be useful to someone.