These were on CSX 2252 and sounded great:
Thrush 24200 - Walker Glasspack Mufflers - Overview - SummitRacing.com
They have a perforated center tube, instead of louvered, for much better flow. I also installed them on my AC MKIV and it's one of the best performance add-ons (and sound) I've done.
Good luck on any system you choose.
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