[Bih_m40i]

I'm just curious has anyone done a muffler delete on their x4 m40i and if so sounds clip?

[SoCalCarGuy]

its so loud without the cats, I couldn't imagine any more restrictions removed. We are probably going to add a resonator to our current catless setup.

[Bih_m40i]

Originally Posted by SoCalCarGuy

its so loud with the cats, I couldn't imagine any more restrictions removed. We are probably going to add a resonator to our current catless setup.

I didn't go catless yet I'm gonna do it just gotta make myself want to do the install lol.

[evilchargerfan]

I didnt delete the muffler, but I did delete the resonator. perhaps this will give a rough idea

(stock cats are untouched)

Originally Posted by evilchargerfan

Also, deleted the exhaust resonator and installed a bottle style resonator in its place


exhaust pipe cutter tool, what a genius idea


took about 15 mins for the first cut


30 ish mins later, its out


the new pipe is 12 inches, the oem resonator was 7 inch. So I measured an extra 2.5 inch on each side of the oem resonator for a total length of 12 inches and made the cuts


test fitting the new pipe out


bolted it down with butt joint exhaust clamps





Sound Clip

https://x3.xbimmers.com/forums/showp...&postcount=509

[Bih_m40i]

Originally Posted by evilchargerfan

I didnt delete the muffler, but I did delete the resonator. perhaps this will give a rough idea

(stock cats are untouched)

https://x3.xbimmers.com/forums/showp...;postcount=509

Sounds good I'll explore all my options