The APS cast dump keeps the gasses seperated down to the flange the cat bolts to where as the Avo is more along the lines of MSR type with a short splitter.

+1 for Butler/RMS Dumps!

Love mine!

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www.ToonMyRide.com.au

'04 E46 S/C M3 Coupe

Norm Butler from Butler Built Exhausts 9472 7373

what u guys think of the BPM splitter dump?

and call me noobatron, but what physical appearances show u that its a bellmouth?

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"Wrong fitment".