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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 > Custom exhaust coming together but need opinons.



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      08-08-2009, 01:55 PM   #1
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Custom exhaust coming together but need opinons.

Ive ordered all the parts Im going to provide my exhaust guy -

Cyba's Titanium tips, and Magnaflow #12866 mufflers. (the same they use on their catback system)

What we are going to do is -
Weld flanges on the old system at the "cut off point"
Weld flanges on the old removed part
Weld flanges on the new installed part.

This way, I can swap back to stock at any time (its a lease) and even remove them if I have/want to for a long trip (if i want it quiet) or for any warranty work that might require it to be stock (not sure they'd beat me up on an exhaust though)

Anyway What Im trying to decide, is - do I leave the stock resonator in, and make it an axleback (easier to swap, quicker, cheaper, etc) Or do I have him make the swap before the stock resonator and remove it?

My plan has been so far and remains to be, keep the resonator. It cant be that much of a restriction, when you figure in I will NOT be removing cats or adding catless downpipes, as they would be too much work to swap back for warranty work...

So the question is - Keep the resonator, and seperate, make flange joints at the axle, or remove the resonator and make the flange joints before it?

I'd appreciate input from those who have removed their resonator and done something similar - sounds clips would help lots.

So far cost is-
Magnaflow 12866 $80x2 = $160
Cyba Tips $130
Labor and Materials Estimate (axleback) $120

Total - $410 installed.

Last edited by Borsig; 08-08-2009 at 02:50 PM.
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      08-08-2009, 02:40 PM   #2
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i actually have a setup similar to this. i basically flanged it where it meets the downpipe. i did 2.25" piping all the way through, deleting the 2nd cat and the resonator and into Magnaflow mufflers. then i put a 4" tip at the end of it. sounds very nice and deep growl. not annoying loud at all.

the best part is the weight you remove from the old exhaust system is a drastic change in weight. when i took my car for a spin you can feel the lightness in the rear. stock mufflers itself weights 40+ lbs each. good luck with everything!
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      08-08-2009, 02:41 PM   #3
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Yeah Im keeping my Cats for now...

I'll post up when its done, I dont have a video camera though - maybe I can borrow one from work.
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      08-08-2009, 02:45 PM   #4
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      08-08-2009, 02:51 PM   #5
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Im hoping for a late next week install. Im waiting on the parts to get here.
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      08-08-2009, 04:40 PM   #6
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What made you select the magnaflows??

Did you consider any other options??
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      08-08-2009, 06:03 PM   #7
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Quote:
Originally Posted by Borsig View Post
Ive ordered all the parts Im going to provide my exhaust guy -

Cyba's Titanium tips, and Magnaflow #12866 mufflers. (the same they use on their catback system)

What we are going to do is -
Weld flanges on the old system at the "cut off point"
Weld flanges on the old removed part
Weld flanges on the new installed part.

This way, I can swap back to stock at any time (its a lease) and even remove them if I have/want to for a long trip (if i want it quiet) or for any warranty work that might require it to be stock (not sure they'd beat me up on an exhaust though)

Anyway What Im trying to decide, is - do I leave the stock resonator in, and make it an axleback (easier to swap, quicker, cheaper, etc) Or do I have him make the swap before the stock resonator and remove it?

My plan has been so far and remains to be, keep the resonator. It cant be that much of a restriction, when you figure in I will NOT be removing cats or adding catless downpipes, as they would be too much work to swap back for warranty work...

So the question is - Keep the resonator, and seperate, make flange joints at the axle, or remove the resonator and make the flange joints before it?

I'd appreciate input from those who have removed their resonator and done something similar - sounds clips would help lots.

So far cost is-
Magnaflow 12866 $80x2 = $160
Cyba Tips $130
Labor and Materials Estimate (axleback) $120

Total - $410 installed.
i got a new magnaflow full catback exhaust from performance peddler for $660.00
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      08-08-2009, 06:07 PM   #8
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I'm swapping out x pipes full back to magnaflows. Cant wait to get them.
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      08-08-2009, 07:00 PM   #9
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Quote:
Originally Posted by 335fourdoor View Post
i got a new magnaflow full catback exhaust from performance peddler for $660.00
I wasnt aware magnaflow had a catback released for the E90...

Theres a part number but Ive yet to see it anywhere. I have seen them for the E92.

I chose magnaflow from previous experience and sound clips.
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      08-08-2009, 07:36 PM   #10
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Quote:
Originally Posted by Borsig View Post
I wasnt aware magnaflow had a catback released for the E90...

Theres a part number but Ive yet to see it anywhere. I have seen them for the E92.

I chose magnaflow from previous experience and sound clips.
part#16791.
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      08-08-2009, 08:58 PM   #11
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Cool project...

OP: Are those the same mufflers from magnaflow pn 16791? The muffler size/shape look very similar.
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      08-08-2009, 09:09 PM   #12
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Quote:
Originally Posted by 335fourdoor View Post
part#16791.
Is for the coupe E92. Coupe and sedan exhausts are different.
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      08-08-2009, 09:11 PM   #13
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Quote:
Originally Posted by XPO186 View Post
Cool project...

OP: Are those the same mufflers from magnaflow pn 16791? The muffler size/shape look very similar.
Yes they are - They are the exact mufflers from the 16791 exhaust 5" round sttraight flow through stainless 14" cans.

Its why I picked them - 6" would be too deep - 4" too ricey. and the 6" long cans would probably be too loud.
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      10-28-2009, 05:24 PM   #14
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HOw did it come out? any pics or videos? Was your extimated Cost the same as your actual cosT?
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      10-28-2009, 05:56 PM   #15
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Is this the world famous Mr. 5 exhaust?
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      10-28-2009, 07:09 PM   #16
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Quote:
Originally Posted by Mr. 5 View Post
Is this the world famous Mr. 5 exhaust?
different. he used Magnaflow #12866 mufflers whereas you used #14336.

Your exhaust (mr.5) sounded great and I was about to go this route, but now I'm curious as to what the 12866 mufflers sound like.

post videos/sound clips!
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      10-28-2009, 07:10 PM   #17
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Send a message via AIM to ar design
If you need flanges to mate to the stock downpipes, let me know - we have them in stock!
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      10-28-2009, 07:23 PM   #18
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Quote:
Originally Posted by Borsig View Post
Is for the coupe E92. Coupe and sedan exhausts are different.
anyone know if the magnaflow for the coupe will fit the e93 convertible ?
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      10-29-2009, 03:48 PM   #19
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      10-29-2009, 04:58 PM   #20
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Quote:
Originally Posted by 335fourdoor View Post
i got a new magnaflow full catback exhaust from performance peddler for $660.00
how is the fit on the full cat back system? is it flanged at the dp's? Any pics installed?
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