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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Question about PE exhaust with catless down pipes keeping secondary cats



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      02-07-2018, 02:45 AM   #23
mattgu40
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Originally Posted by dublin14 View Post
I just found an old post that by using Vibrant resonators in conjuntion with the 2nd cats will get rid of any rasp if I dont like it. Its a cheap fix if needed.
i do have vibrants instead of secondary still raspy but i like it
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      02-08-2018, 11:04 AM   #24
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i do have vibrants instead of secondary still raspy but i like it
Im going with DPs catless, keeping secondary cats and adding Vibrants. See how she sounds?
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      02-10-2018, 01:33 AM   #25
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Where do you plan on adding the Vibrants with the secondaries still in place? There's not much room with the secondaries in there
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      02-10-2018, 11:01 AM   #26
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Originally Posted by mweisdorfer View Post
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Originally Posted by dublin14 View Post
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Originally Posted by mweisdorfer View Post
You can always delete the secondary cats at put resonators in their place. Vibrant 1790 will match perfectly. VRSF makes a nice set of downpipes for a reasonable amount. However, you will need a tune on the car or you will blow codes. MHD or Cobb I believe.

You could go catted down pipes and not need a tune, but they are considerably more money than the VRSF downpipes.
Im doing stage 2 MHD - right now Im going to add the VRSF DPs, 550i clutch and an IC in spring when the car is being driven again. Wheels, B12 Bilstein, and M3 control arms coming also.
Your gonna need to do something in the rear. Remember Newton's 3rd law. You running adjustable sway bar links 1" longer in the front & 1" shorter in the back?

I'd redo all the rear subframe bushings with M3 where applicable and redo the Differential bushings w/ M3. Also, a "while your in there" in the front would be new tie rods. Don't forget new sway bar bushings front & rear.
I have a xi with the ycw coilovers and m3 everything in the rear along with Manzo toe arms. Is it really necessary to have adjustable endlinks in the rear ?
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      02-10-2018, 06:23 PM   #27
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Quote:
Originally Posted by Julian2485 View Post
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Originally Posted by mweisdorfer View Post
Quote:
Originally Posted by dublin14 View Post
Quote:
Originally Posted by mweisdorfer View Post
You can always delete the secondary cats at put resonators in their place. Vibrant 1790 will match perfectly. VRSF makes a nice set of downpipes for a reasonable amount. However, you will need a tune on the car or you will blow codes. MHD or Cobb I believe.

You could go catted down pipes and not need a tune, but they are considerably more money than the VRSF downpipes.
Im doing stage 2 MHD - right now Im going to add the VRSF DPs, 550i clutch and an IC in spring when the car is being driven again. Wheels, B12 Bilstein, and M3 control arms coming also.
Your gonna need to do something in the rear. Remember Newton's 3rd law. You running adjustable sway bar links 1" longer in the front & 1" shorter in the back?

I'd redo all the rear subframe bushings with M3 where applicable and redo the Differential bushings w/ M3. Also, a "while your in there" in the front would be new tie rods. Don't forget new sway bar bushings front & rear.
I have a xi with the ycw coilovers and m3 everything in the rear along with Manzo toe arms. Is it really necessary to have adjustable endlinks in the rear ?
Did you lower the suspension ?
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      02-10-2018, 06:33 PM   #28
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Quote:
Originally Posted by mweisdorfer View Post
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Originally Posted by Julian2485 View Post
Quote:
Originally Posted by mweisdorfer View Post
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Originally Posted by dublin14 View Post
Quote:
Originally Posted by mweisdorfer View Post
You can always delete the secondary cats at put resonators in their place. Vibrant 1790 will match perfectly. VRSF makes a nice set of downpipes for a reasonable amount. However, you will need a tune on the car or you will blow codes. MHD or Cobb I believe.

You could go catted down pipes and not need a tune, but they are considerably more money than the VRSF downpipes.
Im doing stage 2 MHD - right now Im going to add the VRSF DPs, 550i clutch and an IC in spring when the car is being driven again. Wheels, B12 Bilstein, and M3 control arms coming also.
Your gonna need to do something in the rear. Remember Newton's 3rd law. You running adjustable sway bar links 1" longer in the front & 1" shorter in the back?

I'd redo all the rear subframe bushings with M3 where applicable and redo the Differential bushings w/ M3. Also, a "while your in there" in the front would be new tie rods. Don't forget new sway bar bushings front & rear.
I have a xi with the ycw coilovers and m3 everything in the rear along with Manzo toe arms. Is it really necessary to have adjustable endlinks in the rear ?
Did you lower the suspension ?
Yes it is lowered maybe that's why my rear feels under dampened lol
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      02-10-2018, 09:46 PM   #29
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Quote:
Originally Posted by Julian2485 View Post
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Originally Posted by mweisdorfer View Post
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Originally Posted by dublin14 View Post
Quote:
Originally Posted by mweisdorfer View Post
You can always delete the secondary cats at put resonators in their place. Vibrant 1790 will match perfectly. VRSF makes a nice set of downpipes for a reasonable amount. However, you will need a tune on the car or you will blow codes. MHD or Cobb I believe.

You could go catted down pipes and not need a tune, but they are considerably more money than the VRSF downpipes.
Im doing stage 2 MHD - right now Im going to add the VRSF DPs, 550i clutch and an IC in spring when the car is being driven again. Wheels, B12 Bilstein, and M3 control arms coming also.
Your gonna need to do something in the rear. Remember Newton's 3rd law. You running adjustable sway bar links 1" longer in the front & 1" shorter in the back?

I'd redo all the rear subframe bushings with M3 where applicable and redo the Differential bushings w/ M3. Also, a "while your in there" in the front would be new tie rods. Don't forget new sway bar bushings front & rear.
I have a xi with the ycw coilovers and m3 everything in the rear along with Manzo toe arms. Is it really necessary to have adjustable endlinks in the rear ?
Did you lower the suspension ?
Yes it is lowered maybe that's why my rear feels under dampened lol
Well, I don't know 100% for sure on an xi (AWD). I have a 335i with the B12 lowering kit. Therefore, I got the Hotchkiss adjustable front and rear swaybar links. I think they ran about $150.00 or so.

At any rate, the car was lowered about an inch or so both front and rear. So, you have to make the front swaybar links 1" longer than the OEM and subtract 1" from the rear swaybar links. Otherwise, the swaybars themselves will be in a constantly loaded position just sitting there. They should be relaxed just sitting there.

The following link might help you

http://www.e90post.com/forums/showthread.php?t=794197
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      02-14-2018, 06:13 PM   #30
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Here you go, my car with BMW PE, VRSF catless downpipes, and with AND without secondary cats. I didn't like the sound, drone, and riceyness of the secondary cat delete. If you remove them make sure to get the resonators or less restrictive cats.


With secondary cats;





Without secondary cats;


Last edited by GearHead335i; 02-14-2018 at 06:20 PM..
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      02-14-2018, 06:45 PM   #31
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Quote:
Originally Posted by Quinnhogue7 View Post
Here you go, my car with BMW PE, VRSF catless downpipes, and with AND without secondary cats. I didn't like the sound, drone, and riceyness of the secondary cat delete. If you remove them make sure to get the resonators or less restrictive cats.


With secondary cats;





Without secondary cats;

You have xpipe or resonator ?
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      02-14-2018, 08:28 PM   #32
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Quote:
Originally Posted by Julian2485 View Post
You have xpipe or resonator ?
H pipe actually, from the downpipe's to the rear performance exhaust section is an OEM exhaust from an E92 which came with an H pipe instead of the resonator.
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      02-15-2018, 01:58 PM   #33
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Quote:
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You have xpipe or resonator ?
Edit..
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      02-15-2018, 02:02 PM   #34
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Quote:
Originally Posted by Quinnhogue7 View Post
Here you go, my car with BMW PE, VRSF catless downpipes, and with AND without secondary cats. I didn't like the sound, drone, and riceyness of the secondary cat delete. If you remove them make sure to get the resonators or less restrictive cats.


With secondary cats;





Without secondary cats;

I like the sound with the cats.

Not much different than mine now

https://www.dropbox.com/s/0ljow9j86c...82%29.mp4?dl=0
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