[Bagelfast]

Originally Posted by Brey335i

Never heard a fully catless 6AT that didn't drone. Race Cats will significantly reduce drone though. Might be worth looking into that.

I am the first

[utfenix335i]

Can someone give me a sound clip or link to one? Thanks guys.

[335TWNTURBO]

U are probably going to drone. You just have to decide if you want to deal with it or not.

[tibra1]

Originally Posted by 1LUMI335

I am the first

No you are not...stock mufflers dont count...is it eluding you that the OP is using aftermarket mufflers ..

Your setup is not applicable here.

[Bagelfast]

Nope im giving him an option to go fully catless and not drone.. And that would be the same setup he wants just not with the aftermarket mufflers.

[gaifaun]

Originally Posted by 1LUMI335

Well i am fully catless with no resonator, basically straight pipe from the turbo to the stock mufflers.. And i have zero drone... 6AT

I also dont have no X or H pipe, i am fully divorced via each turbo.

did you do the golf tee mod also? if you didn't do the golf tee mod, then wouldn't the flow of exhaust gasses be uneven without an X pipe or an H pipe in the middle?

[StartupJunkie]

Hi OP,

I had a AE exhaust with the HFC in them and they weren't too bad. I then cut out the cats and do notice a very deep drone when the engine is below 2500 RPM.

If you keep the revs in 2800-3000 range, I don't think its much of an issue ... if you lug the motor, its pretty obnoxious inside.

Junk

[Brey335i]

Originally Posted by 1LUMI335

Nope im giving him an option to go fully catless and not drone.. And that would be the same setup he wants just not with the aftermarket mufflers.

I did the golf tee mod on my otherwise stock exhaust and it droned. I have no idea how you can be 6AT and catless and still claim no drone.

[idrift4wd]

car does not drone with golf tee mod. ^

is some peoples perception of drone really different?

just searched for for catless set-ups on youtube.

[tibra1]

Ha..an AE exhaust..one of the few aftermarkets IMO that truly eliminate drone..Im running this catless w no drone..then again Im MT

I do get a little reverberation around 1800RPM but thats b/c I have a coupe and the rear center counsel acts as sonic chamber..a none issue if you have a sedan.

[Royal Flush]

Originally Posted by tibra1

Ha..an AE exhaust..one of the few aftermarkets IMO that truly eliminate drone..Im running this catless w no drone

AE FTW drone and HP wise?

[Bagelfast]

Originally Posted by gaifaun

did you do the golf tee mod also? if you didn't do the golf tee mod, then wouldn't the flow of exhaust gasses be uneven without an X pipe or an H pipe in the middle?

Even with the golf tee active, wouldnt matter, since i have no xpipe or H pipe, it wouldnt even out the gases anyways, its too far back.The valve opens at WOT anyways so it isnt by any means a good solution to even out the gases. X or H pipe has to be way further back into the ehxaust sysem to make any difference. There are a few exhausts out there with no x or h pipe, it comes down to sound difference.. Not much in the way of performance really.

Originally Posted by Brey335i

I did the golf tee mod on my otherwise stock exhaust and it droned. I have no idea how you can be 6AT and catless and still claim no drone.

I completely deleted the valve actuator when i installed my Dimisa tips.
Ive been thru alot of drone/exhausts and cars.This setup is droneless. Heck, my stock ML63 drones stock on the highway, my 335i has none lol. i almost want a lil.