E8X Quad exhaust with performance???

Discussion in '1-Series' started by hassan_hamdan, Aug 9, 2017.

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  1. hassan_hamdan

    hassan_hamdan Lurker

    14
    135i m package
    Hey guys i wanted to ask on opinions for quad exhaust set up for the 135i.

    Im currently running a 09 135i which i am planing on building as a show car, however my personall philosophy is that if a car looks mean, it better drive mean, so while i throw my money at this to look great, i do want this so perform amazing. Im currently in Calgary Alberta and the nearest track that i know of is 3hrs north of me, so i wont be tracking it every weekend, however i still do drive it pretty agressively and my first power goal is 450whp. I do want to run the quad set up. after looking into it it seems that im either left with a few options. 1) Spend a grand alone to relocate the battery and charcoal filter, to that one the 1M, and then spend money on the exhaust. 2) Run the exhaust as per oem, and then branch the tips off and across to get the look of the quad however, you will have crazy unequal lengths and loose performance down the road. or 3) Figure out a third alternative to relocate the filter find a way to run the exhaust.

    Im curious on how some of you guys got it done and the outcome.
     

    Attached Files:

  2. AK135i

    AK135i Specialist

    67
    Anchorage, Alaska
    2010 135i
    Going the second route will not effect performance, and is a common way for getting the quad exhaust to work on an e82. Either way, it will flow better then stock. And even the stock exhaust flows well.
     
  3. hassan_hamdan

    hassan_hamdan Lurker

    14
    135i m package
    Right, but typically unequal lengths in exhaust causes flow issues. I didnt realize how well the stock exhaust was until much after, but iv already got my carbon fiber diffuser (dual exhaust) i would like use haha
     
  4. AK135i

    AK135i Specialist

    67
    Anchorage, Alaska
    2010 135i
    It's not going to do anything. If you have a pipe welding off the end of the ordinary exhaust, the turbulence is at the very end of the exhaust anyways. You can pay the $1000 to have it all routed so you can fit a 1m exhaust for piece of mind, but it's not going to make a difference.
     
  5. Jadams

    Jadams New Member

    1
    Charleston
    135i
    I have the same conundrum and I'm dreading spending the money for the 1m tray, etcetera. Have you considered doing a battery tray delete? Only downside is having the battery relocated in the trunk. May be a cheaper option
     
  6. hassan_hamdan

    hassan_hamdan Lurker

    14
    135i m package
    I have thought of it, iv even considered pushing the charcoal filter up into the trunk, however the issue is that the trunk space is already small enough,and I really would hate to compromise any more space since it is my daily driver. I have considered doing the charcoal filter delete since its main purpose is for emissions, but I will see if there is a way to have the exhaust run below the filter or see if i can blueprint an equal exhaust run.
     
  7. KaiEstrada

    KaiEstrada New Member

    2
    Fort Myers & Pensacola, FL
    2011 BMW 135i DCT
    I just had a custom quad exhasut made ~2 weeks ago. There is no need to relocate anything. Any exhaust shop should have no problem running a 2.5inch pipe through the passenger side. If they need some extra clearance, you can place washers on the bracket that holds the charcoal canister to act as a spacer, pushing the canister up ~1/2 inch. You can also wrap the canister in reflective wrap to ward off any excess heat if you're worried about melting anything.

    Details of my setup on my 2011 N55 135i:
    Ebay carbon diffuser from seller speed-racing
    VRSF 3.5 inch downpipe chopped and mated to a 3inch mid-pipe via V-band
    3inch midpipe to 2.5 inch y-pipe
    Vibrant Performance 1333 tips

    Let me know if you have any more questions
    IMG_5504.JPG
     
  8. hassan_hamdan

    hassan_hamdan Lurker

    14
    135i m package

    Thank actually looks amazing! I will ask, how bad is the drone? Im still on stock downpipes and im planning on getting those installed soon, however I dont want my car to sound like a honda fart canon everytime I drive it around :tongueout::tongueout::tongueout:
     
  9. KaiEstrada

    KaiEstrada New Member

    2
    Fort Myers & Pensacola, FL
    2011 BMW 135i DCT
    Drone isn't terrible imo. Then again I drove a 07 CVT tranny Maxima with an ebay exhaust for 2 years.
    It sounds nothing like a Honda. Cold starts are extremely loud. Idle is surprisingly quiet. Overall the drone is bearable. The car is quiet when I want or a monster when I want. I'm debating adding a Vibrant 12inch bottle resonator or one of their race resonators.

    PM me and I can email you the videos I have. They're too large to upload here
     
  10. doublespaces

    doublespaces Administrator

    AZ
    2009 E93 335i
    Throw them up on youtube and share it here!
     
  11. JBarros

    JBarros Specialist Vendor

    57
    335i
    What the cost of something like that it's damn sweet!!
     
  12. hassan_hamdan

    hassan_hamdan Lurker

    14
    135i m package
    TBH, I think in Alberta it should be around $700 CAD to get it done. Not going to lie, Im tempted on fabing one up myself lol
     

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