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      05-09-2013, 01:46 PM   #51

Drives: Gray E92 M3
Join Date: May 2012
Location: Indiana

iTrader: (3)

Originally Posted by s4play View Post
OP: First awesome write-up!

I plan to do the same thing and wanted to ask you a few things:

a) What rear muffler are you running?

b) IF stock how much increased sound did you get by removing the secondary cats and do you think you gained any power?

c) I'm debating right now to gut the cats or just cut them out since I'm not too worried about the visual part. Would the final effect be the same?

d) If you are running an aftermarket rear muffler, what brand and how's your sound before and after gutting the secondary cats?

Kudos great job, I want to try this before spending $2k+ on a pipe as I prefer to dump that into my Brembo's
I am not the OP obviously, but the 2ndary cats are essentially HFC (200 cell I think). So removing them, you will gain some power, but probably not that much. I am not sure on sound...

If you don't want to spend $2k+ on a pipe, may I suggest Test Pipes to remove the primary? ~$400 plus some way of removing CEL if that annoys you (couple different ways of doing this with the Tune being the most expensive.)

Just point the thought in your head if you didn't already have it!!