I'm going to throw my hat into the ring here. I finally got my setup finished and can relate to this thread lol.
I've had the axle-back for awhile. It's a GRWA valved exhaust, literally no different than Bomiz besides not having branding (so a plus).
The x-pipe is Bimmerworld with the stock Magnaflow resonators, and GESi 10025 in the secondary slot.
I've driven about 200 miles on this setup and wanted to provide my thoughts to help anyone thinking about it. I keep valves open since it honestly sounds weird with them closed, but it's good for being lowkey.
When the car is cold, it sounds more raspy. I don't know if I can really prove this, but the "rasp" seems to go away when it warms up. Now I have to say that this was my impression being inside the car. I never thought it was TOO raspy, but there was some rasp giving it gas at particular RPM's. Also, it doesn't really drone. Windows up cruising on the freeway, it's very manageable. Windows down you can sometimes catch some drone around 3k, but it's something I wasn't even going to mention because I forgot about it.
Now once I heard the car from the OUTSIDE, I think it sounds freakin' incredible. It doesn't sound raspy, it sounds throaty and exotic.
I'm going to have an active Youtube channel coming up here soon (New Years resolution), but wanted to get a quick video linked here for you guys that want to hear it.
One question I do have for those in the know, if I ever did want to swap over to those Vibrant 12" resonators, is there enough space for them after cutting the stock Magnaflow resonators out? Looks like a tight squeeze...
Enjoy and let me know if you have any questions!!
