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      08-17-2012, 05:03 PM   #22
United Kingdom

Drives: 2008 E92 M3 DCT JZB/FR
Join Date: Jan 2010
Location: London, England

Posts: 638
iTrader: (1)

I've done the secondary cat delete and am happy with the result.

I would say it's got 5-7% more volume, and sounds slightly more aggressive. No Cel issues or drone at all with the oem rear box.

I have tried different setups before which sound great for a Month, but then they would get on my nerves.

The secondary cat delete gives it a subtle improvement and is worth doing. The cats can easily be smashed out from their housings leaving everything looking standard once welded up again.