Hey Rob,
I've got a MY09 3RB wagon and like the idea of a meaty but muted exhaust note.
I bought my wagon off the first owner who put in a pair of Supercat mufflers. They bolt on to the stock pipe (1.75" inner dia). Looks like a fairly standard oval muffler. Exit is through a single outlet that splits into two for a quad tip look. Pics attached.
This produces a nice meaty, refined note but there is a bit of drone going up big hills between 2,000 and 2,500. On flat road it sounds just right. Not sure how to reduce that bit of drone, maybe smaller dia outlet? Others who are used to louder set ups might not notice anything as this is all a bit subjective.
Have always been interested in replacing the third cat with a Y pipe just to let the H6 breathe a bit better but have been advised that the exhaust gets a bit louder and raspier, and you loose some torque due to lower backpressure. Would be nice to have an option that replaces the Y pipe with a muffler and keep stock dia tubing to address these issues. And then have you proposed set up at the back. Just something else to throw into the mix.
Anyway, if you're ever in Melbourne and want to have a listen in the spirit of R&D, please feel free to get in touch.
Maurice
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