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**cainchapman** · 03-23-2006, 11:11 PM

BMW have done a great job on designing the Cat in the 540's. I have removed mine and have not noticed an increase in power. I have not dyno'd it since however. It just sounds a little sweeter.

More gains are to be had in the rear muffler.

03-23-2006, 11:11 PM	#2
cainchapman Name: cainchapman Title: Senior Member Status: Offline Join Date: May 2005 Location: Auckland, New Zealand Rate My Car: 126 / 340 Your Ride: 1995 540LE	BMW have done a great job on designing the Cat in the 540's. I have removed mine and have not noticed an increase in power. I have not dyno'd it since however. It just sounds a little sweeter. More gains are to be had in the rear muffler. __________________