MPE Questions

MPE is barely louder with windows up unless you floor it, then it is louder. With windows down and bouncing off hills/sidewalls/tunnels the sound is amazing and cannot be replicated by any other exhaust, especially at part throttle. Over time, it definitely gets louder..would say increases by 15%. Cold start for me is definitely louder. Wife noticed immediately post the change when I would leave in early am.

Anyone here do the install DIY? Seems straight forward and bolt-on.

IB M wrote

Anyone here do the install DIY? Seems straight forward and bolt-on.

Yup, I did. Taking my time in the dark and cold, took me 2 hours.

dparm wrote

The packing material will settle over time so expect a minor change in sound, but it will not be "substantial". I can't really advocate getting test pipes with the MPE; the sound gets really weird. It was designed to be used on stock headers/cats/midpipe.

I'll take it off your hands if you decide it's too quiet. I'm local!

I beg to differ.

I got lucky as it came with the MPE when I picked up my M3 with 9,000 miles. I really enjoyed the exotic noise and the howl it made but wasn't fully content and wanted to be a bit louder. I was torn between buying an xpipe and test pipe but people complained about it being too raspy when paired with the MPE. After much research I pulled the trigger on a set of test pipes and what a difference it made in terms of noise and some gain in torque too. It definitely changed the attitude of the car and I try to find excuses to drive it now just to hear the glorious noise.

The test pipes gave it a little more rasp but nothing annoying and very minimum cabin drone when cruising. Just a huge grin on my face every time I see a tunnel down the road.

L4ces wrote

If you barely heard the MPE, then what did you miss?
The GT2 is a extreme opposite!
Are you wishing to go back to the MPE?

Because gt2 is toooo extremem
I return to stock after 2 month. I couldnt stand its drone and booming.
I miss mpe its quite but different from high rpm.
I am at age of mid 30's so you get the idea. I have passengers most of the time including my wife

IB M wrote

Anyone here do the install DIY? Seems straight forward and bolt-on.

I am certainly not mechanically inclined, but was able to fit mine using the instructions in this post: http://www.m3post.com/forums/showthread.php?t=299777&highlight=DIY%3A+Axle-Back+Exhaust+Removal

Using the jack and 2x4 as instructed in the post helps to complete the task if you are doing so on your own (which I did). It's a straightforward job and with the right tools goes fairly quickly.

Only thing I'd be worried about on the install is that the tubing has seized up a bit from years of moisture and expansion/contraction. Cars seeing winter weather will have this multiplied. Just get a bottle of penetrating oil (PB Blaster, etc) and spray it a bunch of times before beginning the work.

dparm wrote

Only thing I'd be worried about on the install is that the tubing has seized up a bit from years of moisture and expansion/contraction. Cars seeing winter weather will have this multiplied. Just get a bottle of penetrating oil (PB Blaster, etc) and spray it a bunch of times before beginning the work.

I did mine myself. Key tools that help a lot, exhaust hanger pliers to remove the rubber hanger. Also pipe expander in case pipe does not fit. Other than that it was simple mi would suggest if doing yourself, mask off the lower bumper area in case you hit it with the exhaust while trying to line it up.