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07-01-2015, 04:29 AM | #1 |
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E90 328i Cat-Back on 128i?
Just wondering if a cat-back exhaust marketed for the E90 328i would fit an E82 128i? if not, why not? Could it be made to fit by a good exhaust shop?
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07-01-2015, 12:22 PM | #2 |
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- e9x 328i has a wide box so its inlet pipe placement may not be like 1 series. compare underside pictures.
- e8x Car battery tray may pose an issue, the 1M tray may be a solution. - Exhaust hooks will not mount, need to be rewedded.
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In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is |
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07-01-2015, 02:32 PM | #3 |
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If it's just a matter of re-welding the exhaust hangers into a different position, I would think that any decent exhaust shop could handle that. I guess I'm mostly worried about the path upstream of the muffler, like is the bracing drastically different or something like that.
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07-01-2015, 04:22 PM | #4 |
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If you're looking for more options for mufflers, the 135i stock, performance, and aftermarket systems are/should be straight forward. Doesn't seem worth the trouble to fit a 328i exhaust system on a 128i
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07-01-2015, 04:53 PM | #5 | |
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The stock 128i exhaust will be too tame. 135i muffler is not plug and play, I thought? And I figured if I need custom work done to make the exhaust fit, I might as well get something that was designed for the N52 - hence, 328i, although that would involve welding new exhaust hangers (no big deal) and shortening the total length (don't know implications of this). Incidentally, I'm looking at the Borla cat-back for 328i, because they have a reputation for mild sound (OEM+) which I think will pair well with headers, and good quality. Supersprint's muffler is a contender, but at $1200, it's a little hard to swallow. The Borla I mention above is only a little cheaper, but it at least replaces section 2 as well. I think there is a Magnaflow cat-back, but I bet it's pretty loud and not really what I'm looking for (which, plainly stated, is something between stock and too loud - something still civilized - Borla and Supersprint are the brands that come to mind). The cheap option would be to use a Borla universal muffler in place of the PE, but what do I do about tips? And I still have the problem of welding hangers on it. I guess a cat-back appeals more to me than a universal muffler because it replaces more stock pipe with ostensibly lighter, higher-quality material. There aren't too many other aftermarket options I'm aware of.
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07-01-2015, 05:19 PM | #6 | |
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07-01-2015, 05:23 PM | #7 | |
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07-01-2015, 09:04 PM | #8 |
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I am running AA headers on my car. Here is what I got going.
AA Headers --> stock piping to 2nd cats --> stock piping to stock resonator --> custom muffler delete. I don't think it is too loud unless you got flat out up to higher RPMs. There is definitely some drone though from 2k to just below 3k, but in my opinion the noise itself is not too loud. I have heard 135is with catless downpipes and larger piping that have extremely loud start up noise and idle noise, that is not the case with my set up. Honestly though, if you are looking for a quiet ride, you should not be looking at putting headers on your car since it, more than anything else, removes most of the restriction of exhaust gases and noise on your car. My other suggestion is this. Go to a muffler shop and tell them to get a good resonator or muffler for you and build you a custom exhaust after the 2nd cats. It will be much cheaper than a straight up branded and perform about the same. I am suggesting this, since the stock BMW mufflers of any model car are extremely heavy and you can shed a lot of weight getting rid of it.
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E82 128i M-Sport 6MT - Black Metallic Sapphire - MFactory Helical LSD, Koni Yellow Sport Dampers, Swift Spec-R Springs, E90 M3 Front Sway Bar, M3 Front Control Arm Set, Whiteline Rear Subframe Bushings, Stoptech Stainless Steel Brake Lines, Michelin Pilot Super Sport Tires, Active Autowerke N52 Tune, aFe Magnum FORCE Stage-2 CAI, Active Autowerke Headers, Custom Muffler Delete, BMW Performance SSK, ZHP Shift Knob, eBay Clutch Stop
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07-02-2015, 02:03 AM | #9 | |
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Sound is obviously subjective, but I'm 99% certain your set up (headers & a muffler delete) would be too loud for me. From what I hear, my muffler (BMW PE) is only marginally quieter, and is louder than most people would consider reasonable. I love the sound of the BMW PE without headers, but as it is, it's alreaady almost borderline too loud. If I could keep the same sound after adding headers, I'd be golden, but that's obviously impossible. So the Supersprint muffler is still a possibility, but it's looking like the custom exhaust set up might be the way to go. I could probably pick up a Borla ProXS at 1/10th the cost of the SS unit (or less!). Of course, it would require professional installation (hangers welded, tips welded) but would still be significantly cheaper. I'm reaching out to a custom exhaust shop near me that does mandrel bending, TIG welding, etc. - they should hopefully be able to give me some better ideas as far as options.
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07-02-2015, 09:12 AM | #10 | |
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07-02-2015, 04:48 PM | #11 |
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Do tell. PM me?
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07-05-2015, 08:21 PM | #12 |
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Magnaflow axelback for 128i features a resonator and some nice exhaust tips. Should be tame for a AA header, since it sounds just a bit quieter than PMWPE according to videos. I even recall someone taking Maganflow 128i system and looking up the part numbers of muffler & resonator to make it a bit cheaper/custom
But I agree with you, headers make muffler selection a pain
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128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is |
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07-08-2015, 06:08 AM | #13 | |
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If you want more sound, I'd second the 135i exhaust, or muffler delete, it works great with the N52, and I'd say it still builds up the right amount of back pressure for the N52 if you go the 135i route. Having done the muffler delete, on the 128i it is much quieter and pretty much no drone in my opinion compared to the 328i with a muffler delete, might be due to the resonator design, but it adds a great sound to the car, not too loud and no loss of low end torque. Also modifications required to get the 135i muffler to fit is barely anything. If you want sound but don't wanna mess with low end torque and all that good stuff with your N52, I'd say 135i stock exhaust (don't connect the valve actuator), and resonator delete. Heard that combination before and it sounds really good, got some deep notes when just slowing picking up / cruising, and when you punch it you notice it. Don't know about drone though with a resonator delete... So many more options in the market but it seems that you want a stockish kind of approach.
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07-08-2015, 09:10 AM | #14 | |
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That's my setup, 135i stock muffler + Superspring resonator delete pipe. I think it sounds great, and it doesn't drone. It did a little bit at first but it all went away after a hundred miles or so. |
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07-09-2015, 10:47 AM | #15 | |
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I would just grab an exhaust built for your car. GThaus Meisterschaft is a very good option
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07-10-2015, 06:31 AM | #16 | ||||
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Yet another option is to keep the BMW PE and just try to quiet the whole thing down with Vibrant's Ultra Quiet resonator in place of the factory unit. However, I'm not exactly sure this would be any quieter, and have reservations about removing the N52/128i-specific resonator. |
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07-11-2015, 07:00 AM | #19 |
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You have any experience with the Borla ProXS? I'm guessing it will be quieter than BMW PE but more aggressive than stock. I want it to be civilized, but I don't want to lose TOO much character...
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07-11-2015, 07:21 AM | #20 |
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I just saw a video last night of the borla on a stock 328i and it sounded really good, I also heard a magnaflow on a headered 328i that again, sounded really good. I would lean towards Borla personally, they tend to be quieter (and it's what I plan on doing) and these options don't cost a lot of money, and can pick up a few hp. It's a win win.
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07-13-2015, 07:40 PM | #21 |
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07-13-2015, 08:12 PM | #22 | |
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