[Biginboca]

Originally Posted by MountaineerBMW11

What is MILV's? Do you know if these lean codes had tunes?

Some had them all stock and some had them with tunes.

[MountaineerBMW11]

Installed. I have a video but don't know how to upload

[MountaineerBMW11]

Before and after Video

[bluewater328]

Originally Posted by MountaineerBMW11

Before and after Video

To confirm, you used the Magnaflow high-flo middle resonator?

[MountaineerBMW11]

I bought the cat back magnaflow touring exhaust and kept the resonator.

[Ryan1963]

Originally Posted by Biginboca

I’ll admit I’m curious also, but looking at those pics it seems like a lot of work for what is likely a less than ideal outcome. You can get real N52 headers and mod your stock muffler for like $600. You have a good deal of work ahead of you to mate those headers and swap that bulky muffler that came from a car that never even sounded very good when it had it.

Bulky and heavy the e46 M3 muffler is; ideally I plan to offest the weight with a carbon fiber trunk lid if I deam it necessary, regardless I love the way the e46 m3 sounds in it's stock form. I never cared much for the e46's body style, the E36's style destroys it imo.

Anyway, for anyone looking at a catted header option the stock s54 headers possess a total of (2) 200 cell catalytic converters, 1 per bank, as opposed to our stock n52 catalytic converters which are comprised of (2) 400 cell catalytic converters. This pertains to S54 engine equipped vehicles distributed throughout the US only I believe. Long tube headers plus less restrictive 200 cell catalytic converters.