[Briancanadiano]

Hey guys, so my car is a 2007 335 coupe fbo minus meth.
My exhaust setup is: Bms catless dp, and 335is mufflers. I love the sound and everything, but the rasp/canny/tinny sound after 3500 rpm is way to obnoxious and ricey for me and I don't like it.
Question: my idea is to put in vibrant resonators, should I add them upstream in front of the secondary cats? Or should I remove the secondary cats and put in the resonators, or just keep both.

I'm scared that by removing the secondary cats and switching for the vibrant resonators it'll get louder, and I don't want louder as it already loud as hell. Any input will be very appreciated. Thank you.

[Briancanadiano]

No one?

[matthewo]

I have the vibrant resonators in place of secondary cats with catless dps and stock 335i mufflers, sounds pretty quiet to me, and I don't like loud exhausts on my DD, I cannot complain one bit about any part of the sound it makes...

I know the bmw cabin is quiet and muffles a lot of it im sure, but even revs outside the car sound good, and not much louder than stock.

maybe the 335is exhaust is a lot different I cant comment on that as I don't know, maybe I just don't stand outside reving it to 3500 much, but I cannot tell from the interior or with the windows down mine sounds fine...

[Tim603]

Honestly your best bet is probably going to be an aftermarket cat back of some sort. That will likely have resonators included

[jjbmuu]

Just remove your secondary cats and put resonators in their place.. You'll be fine, I know you have a 335is muffler which is a bit louder, but I think you'll be okay with the minimal increase in sound.. DP's secondary cat replacement with resonators, and a PE or IS muffler is by far the most practical setup for this car if you daily drive it.

[Marcadelic]

if you think catless dp's and an iS muffler is loud why don't you just switch back to stock muffler and swap the secondary cats out with vibrants?

[Briancanadiano]

Originally Posted by J.J4ck0wsk1

Just remove your secondary cats and put resonators in their place.. You'll be fine, I know you have a 335is muffler which is a bit louder, but I think you'll be okay with the minimal increase in sound.. DP's secondary cat replacement with resonators, and a PE or IS muffler is by far the most practical setup for this car if you daily drive it.

I'm happy with the tone down low, I just don't like the really high pitch it has up top together with the rasp. The loudness is more then enough for me, that's why I'm worried it might get to loud with the vibrants in there..

[JasW]

Originally Posted by Briancanadiano

I'm happy with the tone down low, I just don't like the really high pitch it has up top together with the rasp. The loudness is more then enough for me, that's why I'm worried it might get to loud with the vibrants in there..

Have you decided what you're going to do? I'm in pretty much the same boat -- ar catless DPs with 335is exhaust, and the raspy tin fart cannon sound when I wind it out in lower gears is nasty. Aside from whether I should just swap out the secondary cats with the Vibrants, I have no idea which Vibrant to get -- the 1790 2.25" or the 1792 2.5".

[Briancanadiano]

Originally Posted by JasW

Have you decided what you're going to do? I'm in pretty much the same boat -- ar catless DPs with 335is exhaust, and the raspy tin fart cannon sound when I wind it out in lower gears is nasty. Aside from whether I should just swap out the secondary cats with the Vibrants, I have no idea which Vibrant to get -- the 1790 2.25" or the 1792 2.5".

1792 is the one. I'm selling mines.

[JasW]

Originally Posted by Briancanadiano

1792 is the one. I'm selling mines.

You decided to live with the rasp?

[Briancanadiano]

Originally Posted by JasW

You decided to live with the rasp?

Ya, I actually changed the fud on my jb4 from 98 to 0 drastically made the exhaust more quiet, and now there isn't as much rasp, so I decided to live with it. I have 2 brand new ones in the box. I have a FS thread. Asking $150cad shipped witch is what I payed for it.

[JasW]

I'm still trying to decide whether to get them in the first place -- from what I understand, the only place to put them is where the secondary cats are. I have a convertible, and the last thing I want is to be overwhelmed by the smell of the fumes . . . .

[Briancanadiano]

Originally Posted by JasW

I'm still trying to decide whether to get them in the first place -- from what I understand, the only place to put them is where the secondary cats are. I have a convertible, and the last thing I want is to be overwhelmed by the smell of the fumes . . . .

A friend of mines installed a full exhaust system no primary or secondary cats and I can't even tell the difference of smell...

[JasW]

That's good to know. I start up in my garage in the morning and the last thing I want to do is fill it with stink.

Still not sure how you reduced rasp by setting future use D to 0 -- isn't that to fix wastegate rattle? I don't have a JB4 so I only have a passing familiarity with its parameters. I run a Wedge custom tune for MHD, so I'm wondering if he might be able to tweak my tune to do the same thing.

How's the cold start sound? Did it help with that? That's the other problem in addition to the rasp -- it wakes the house if not the whole neighborhood.

[Briancanadiano]

Originally Posted by JasW

That's good to know. I start up in my garage in the morning and the last thing I want to do is fill it with stink.

Still not sure how you reduced rasp by setting future use D to 0 -- isn't that to fix wastegate rattle? I don't have a JB4 so I only have a passing familiarity with its parameters. I run a Wedge custom tune for MHD, so I'm wondering if he might be able to tweak my tune to do the same thing.

How's the cold start sound? Did it help with that? That's the other problem in addition to the rasp -- it wakes the house if not the whole neighborhood.

The wastegate position plays a huge role with how the exhaust sounds. The more closed the more quiet, and the more open the louder. Also affects the cold start as the wastegate is held more closed then before..I'm sure it's doable with the wedge tune aswell.

[nitehawk]

Guys, contrary to popular belief you CAN fit the resonators while still keeping your secondary cats. Several people have done this. Here's an example of one I found. Basically, they have to go right after the X-pipe before the diff. Drivers side is easy, passenger side may require a little precision cutting or customizing

[JasW]

Originally Posted by nitehawk

Guys, contrary to popular belief you CAN fit the resonators while still keeping your secondary cats. Several people have done this. Here's an example of one I found. Basically, they have to go right after the X-pipe before the diff. Drivers side is easy, passenger side may require a little precision cutting or customizing

I actually saved that pic from the other thread, lol. I plan to take it to a quality muffler place to see if they can do the same.

[Briancanadiano]

Originally Posted by JasW

I actually saved that pic from the other thread, lol. I plan to take it to a quality muffler place to see if they can do the same.

This is a e90. E92 doesn't have xpipe. Different story for e92

[JasW]

Originally Posted by Briancanadiano

This is a e90. E92 doesn't have xpipe. Different story for e92

Then you might want to tell the guy who took and posted this pic in the other thread that the E92 he thinks he has is really an E90.

http://www.e90post.com/forums/showpo...&postcount=163

Hard to know who to believe around here sometimes!

Also, these were the 1790 Vibrants, which it turns out are recommended for the stock exhaust, not the 1792. You apparently need couplers and more welding work to fit the 1792.

[Briancanadiano]

Originally Posted by JasW

Then you might want to tell the guy who took and posted this pic in the other thread that the E92 he thinks he has is really an E90.

http://www.e90post.com/forums/showpo...&postcount=163

Hard to know who to believe around here sometimes!

Also, these were the 1790 Vibrants, which it turns out are recommended for the stock exhaust, not the 1792. You apparently need couplers and more welding work to fit the 1792.

The vibrant website sais that 1792 is the one. My friend also has them installed and he told me he got the 1792 which were a breeze to install.. So maybe there is some sort of misunderstanding.

[JasW]

Originally Posted by Briancanadiano

The vibrant website sais that 1792 is the one. My friend also has them installed and he told me he got the 1792 which were a breeze to install.. So maybe there is some sort of misunderstanding.

The OP in the thread used the 1790, as did a couple/few others in the thread apparently. I'm sure a good muffler shop could work with either, but one or the other is going to take more time. I wish there were a straight up answer.....

[nitehawk]

Originally Posted by JasW

The OP in the thread used the 1790, as did a couple/few others in the thread apparently. I'm sure a good muffler shop could work with either, but one or the other is going to take more time. I wish there were a straight up answer.....

1790 is the proper part for stock exhaust. But you can make a 1792 fit. Go with 1790.