It looks difficult. You could add turbosHello,
I am looking for something not to restrictive and reasonably quiet
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My belief that headers of the proper length and diameter and proper collector length and diameter might make an albeit slight improvement in HP over the already very good LS7s. The ceramic coating was at least empirically shown to reduce engine bay temps in my Viper. Of course, this remains to be seen.....:thumbsup:
There aren't any side-exit cars that are quiet, as far as I know. As Jack said, there are packaging problems in terms of muffler length, etc.
One possible solution (?) might be to use a larger suitcase-style muffler with an inlet just off the j-pipe, with an outlet dropping down to where they traditionally exit. But that would be some complicated piping, and you'd have to mock it up to see if it would fit. And then you wouldn't know if it would meet your idea of "quiet" until you drove it...
Using a rear exit allows more space to fit cats and mufflers, and possibly even to connect them up as in an H-pipe or X-pipe, to improve the tone.
Do cats contribute to noise reduction to a meaningful extent? We're planning on going without cats (but with mufflers).