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  1. #1
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    cp-e BMW N54 Downpipes. New Design, New Price. RWD+AWD Fitment for 1 and 3 Series BMW vehicles.

    Click here to enlarge




    At Custom Performance Engineering we are excited to be working with these great vehicles and in supporting the BMW platforms we constantly review our designs and products - bringing only the best to the market.

    The XI or xDrive 335i vehicles have quite a different design when it comes to the front sub frame. The tighter space, added geometry makes for a tight squeeze indeed, but its not impossible.

    We have taken our proven downpipe design and revised it to be compatible with both RWD and AWD 3-series BMW vehicles. Furthermore - the same design works on the 1-series cars with the N54 motor. This makes for more efficient engineering and manufacturing - allowing us to also revise the pricing.

    Click here to enlarge

    The downpipes feature a cast bellmouth with a machined V-band flange for an OEM-like fitment. The castings include a dimple for water line clearance - this ensures easy fitment. Castings allow for a smooth transition and tight radius turns - otherwise complex cutting and welding would need to take place which is neither cost effective or reliable in the long term.

    Click here to enlarge

    The castings transition from the OEM turbo outlet to 2.5" piping. We had explored doing 3" piping with the redesign - as has been popular with the N54 community - but physics dictates that air or, in this case, exhaust gas, will move as efficiently as the smallest pipe diameter will allow. Since the OEM cat-back exhaust is roughly 2.36" and aftermarket exhaust systems are 2.5" - a neck-down to 2.5" will be necessary for fitment regardless - which would, in turn, render any 3" piping prior to the reduction useless. This also goes a long way to keep the design functional, elegant and cost effective.

    The system is full 304 Stainless Steel piping with stainless castings and stainless laser cut flanges. TIG welded to perfection and quality. Piping is mandrel bent for smooth flow.

    Click here to enlarge

    Here is a full feature list as well as updated pricing.

    $649.90 - Catless offroad
    $949.90 - with High-flow catalysts

    CAM/CAD Engineering
    Full 304 Stainless construction
    Cast bellmouths for smooth transitions
    Mandrel bent tubing
    Laser cut flanges
    TIG welded
    Available with High Flow Catalytic converters
    Optional Wideband O2 bungs available
    Made in the USA
    Lifetime Warranty


    +12whp +10wtq

    Click here to enlarge

    Check out more photos on Facebook, or visit our website for info and ordering.

    http://www.facebook.com/gocpe

    h
    ttp://www.cp-e.com
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    Last edited by www.cp-e.com; 12-16-2011 at 05:11 PM.
    Custom Performance Engineering
    www.cp-e.com
    BMW N54/N55 | Forced Induction | Direct Injection Specialists

    Supporting BMW 1M | 135i | 335i | 535i and more

    Facebook: www.facebook.com/gocpe
    Twitter: http://twitter.com/gocpe
    youtube: http://www.youtube.com/CustomPerformanceEng

  2. #2
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    Looks clean! GLWS guys. One size fits all you can't beat that. The resale will be awesome on these since anyone can use them.

  3. #3
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    looking good guys!

    for the record, the stock 335i exhaust is 2.36" inner diameter
    Last edited by dzenno@PTF; 12-16-2011 at 04:51 PM.
    Click here to enlarge

  4. #4
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    Well done guys! I think you are the only company who has an application like this.

  5. #5
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    Looks good. Xi customers: We should have these in stock shortly! Click here to enlarge

  6. #6
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    very cool!
    || DCT | ESS Tune | ACM Test-pipes | AA Green Filter | Swift Spec-R Springs | Stoptech ST-40 F || || My Youtube Channel|| My Vimeo Channel ||

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    Do you make these in RHD or will they fit RHD vehicles, same goes for you Exhaust does it fit RHD vehicles (135 and 335)?

  8. #8
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    Promoted to front page.

  9. #9
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    535i fitment???... When will it be available?...

  10. #10
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    So only difference between these and ur older version, is that now one downpipe will fit xi and i cars?

  11. #11
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    cp-E, is your 2.5" measured as ID or OD on the pipes?

    Many manufacturers claim 2.5" downpipes/exhaust when in fact they're 2.5" outer diameter Click here to enlarge
    Click here to enlarge

  12. #12
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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by dzenno Click here to enlarge
    cp-E, is your 2.5" measured as ID or OD on the pipes?

    Many manufacturers claim 2.5" downpipes/exhaust when in fact they're 2.5" outer diameter Click here to enlarge
    2.5" OD, as most other manufacturers - its standard sized piping for US supplied Stainless Tubing. Also is close to ~64mm tubing - which is standard elsewhere.
    Wall thickness on our 16GA piping is around .06"
    Custom Performance Engineering
    www.cp-e.com
    BMW N54/N55 | Forced Induction | Direct Injection Specialists

    Supporting BMW 1M | 135i | 335i | 535i and more

    Facebook: www.facebook.com/gocpe
    Twitter: http://twitter.com/gocpe
    youtube: http://www.youtube.com/CustomPerformanceEng

  13. #13
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    Click here to enlarge Originally Posted by 5soko Click here to enlarge
    So only difference between these and ur older version, is that now one downpipe will fit xi and i cars?
    The piping has been redesigned to fit both XI and non-xi vehicles.
    Custom Performance Engineering
    www.cp-e.com
    BMW N54/N55 | Forced Induction | Direct Injection Specialists

    Supporting BMW 1M | 135i | 335i | 535i and more

    Facebook: www.facebook.com/gocpe
    Twitter: http://twitter.com/gocpe
    youtube: http://www.youtube.com/CustomPerformanceEng

  14. #14
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    535i fitment is pending.

    The vehicles are different from the 3 series. We are working on getting a car in for testing/measuring to get a 100% fit.
    Custom Performance Engineering
    www.cp-e.com
    BMW N54/N55 | Forced Induction | Direct Injection Specialists

    Supporting BMW 1M | 135i | 335i | 535i and more

    Facebook: www.facebook.com/gocpe
    Twitter: http://twitter.com/gocpe
    youtube: http://www.youtube.com/CustomPerformanceEng

  15. #15
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    1 out of 1 members liked this post. Yes Reputation No
    Click here to enlarge Originally Posted by nomercy Click here to enlarge
    Do you make these in RHD or will they fit RHD vehicles, same goes for you Exhaust does it fit RHD vehicles (135 and 335)?
    The downpipes do fit both RHD and LHD vehicles.
    Custom Performance Engineering
    www.cp-e.com
    BMW N54/N55 | Forced Induction | Direct Injection Specialists

    Supporting BMW 1M | 135i | 335i | 535i and more

    Facebook: www.facebook.com/gocpe
    Twitter: http://twitter.com/gocpe
    youtube: http://www.youtube.com/CustomPerformanceEng

  16. #16
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    1 out of 1 members liked this post. Yes Reputation No
    Wow awesome pricing! Hats off to you CP-E
    2006 AW/Black ZCP 6MT


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    E46 M3 Owners of the World <---- Join the FB group!!


    Instagram :: @NotSMG.M3

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  17. #17
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    Can't wait to finally pick a set up along with the resonated mids.That 1M rear-section is very tempting as well..... Click here to enlarge

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