[roarf]

Yes, they work. My exhaust is completely stock except for one AR20 on one pipe and the stock resonator on the other pipe. I'd say the rasp was reduced 90-95%. You still get a little at high RPM but it's not near as obnoxious as it was before. Just the right amount IMO.

[Breezy//M]

Was going to do this, but honestly I love the sound of my m with the AP. Nice and loud, great growl to it. Plus wasn't worth it to me, my local muffler guy was kind of shocked I originally wanted him to use such a "cheap"part on my car. He had installed plenty, and he was under the impression they were some cheap resonators (which they are.) At which point I questioned whether or not I personally wanted to drop close to 100 on this mod, and if it bothered me that much. I decided it wasn't worth it and am happy with my decision.

[y0c0nsci3nc3]

Originally Posted by bimmermilan

Here is what I have experienced. If you run catless then the AR20/25's wont help at all, you will still have rasp. If you run catted with twin AR's then you will get rid of 90% of the rasp. To get rid of all the "RASP" you need to run twin Magnaflow resonators and cats. Video description below.....

http://www.youtube.com/watch?v=Gd56u...2&feature=plcp

Ask me how I know....Lol

What is the difference between Magnaflow resonators and AR20/25s resonators?

[y0c0nsci3nc3]

Originally Posted by iceberq

Yes. I had Agency power muffler with stock everything else. It was loud and raspy.
Installed the extra resonator and suddenly it was too quiet + no rasp.
Then I removed the section 2 resonator to get a little more sound back.
After 500 more miles it got louder and a little bit of rasp started again, but it is now better than when I had just the muffler.

Here is a video of my car, revving inside a partial-open air garage and sitting inside my car
BMW E46 M3 Exhaust Reving (Agency Power Muffler + Modded Section 1 & 2) - YouTube

Iceberg, do you have a drive by video too? I'm running an AP muffler as well and I like your set up, but eventually plan to do catless headers as well.

[Rendezvous]

Yes they help for sure.

[iceberq]

Originally Posted by y0c0nsci3nc3

Iceberg, do you have a drive by video too? I'm running an AP muffler as well and I like your set up, but eventually plan to do catless headers as well.

Unfortunately I don't. I want headers too in the future but I'll pair it up with cats in section 1. That should keep it the rasp back down a bit