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Old 09-30-2012, 11:59 PM
ard ard is online now
Resident Curmudgeon
Location: Sierra foothills, California USA
Join Date: Jul 2009
Posts: 15,643
Mein Auto: '12 X5 35d/E39M5/996TTX50
Originally Posted by ///fast5 View Post
I had the same problem due to milage mine is around 105k mile replaced the cats with 200 cel high performance magna flows and now my car sound better and runs so smooth.

'due to mileage' is not a reason.

And the magnaflo "high performance" cats are just cheap thin walled converters that will not touch OE in terms of longevity or performance...
Keep it as simple as possible...but no simpler.

Last edited by ard; 11-13-2012 at 08:22 PM.
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