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  1. #1
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    ar design BMW 135i / 335i 3" Hi-Flo Downpipes

    ar design 3" Hi-Flo™ Downpipes

    We are extremely excited to present our 135i / 335i 3" Hi-Flo™ catless downpipes (also available in a catted and resonated version)! The only TRUE 3" downpipes currently on the market! In addition to an intoxicating and exotic sound, these downpipes add significant power and virtually eliminate turbo lag, making the fabled N54 engine even more responsive!

    Click here to enlarge
    335i Catless Downpipes


    Our Hi-Flo™ 3" Catless Downpipes Feature:

    • The only TRUE 3" catless downpipes currently on the market! 3" tubing until cat-back flange - all systems currently on the market reduce to 2.5" much closer to the turbocharger.
    • Typical gains with tuning in the 30bhp range!
    • 100% hand crafted in the USA from premium 304 Stainless Steel - flanges and O2 bungs included!
    • Water-jet cut 304 Stainless cat-back flanges, and CNC'd 304 Stainless V-Band flanges.
    • 100% TIG welded, argon back-purged.
    • Set of our exclusive bomb-proof exhaust gaskets included.
    • Grade 10.9 Metric Hardware (145,000PSI tensile strength, C32-C39 Rockwell, Zinc Plated), and Nord-Lock positive locking re-usable washers included.
    • Factory location O2 bungs
    • Available with a 2000°F ceramic coating. Coatings come with a 3 year warranty against corrosion and rust to original owner.
    • Lifetime warranty against any manufacturing defects given to original owner.
    • We do NOT grind/polish our welds as some other manufacturers do. Grinding welds compromises the strength of the weld, and can lead to weld failure! Especially critical in applications exposed to temperatures in excess of 1200°F. Such temperatures will also rapidly deteriorate the polished finish.



    To purchase, please visit: http://www.ardesign.info/store/selec...i/exhaust.html
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  2. #2
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    Are these different than the version that has been around for a few years? If so, any data to show gains between the old and new?
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    PTF Tuned Cobb Stage 2+ | H&R / Koni Sport | BBS LM

  3. #3
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    +1 to the above. Beautiful downpipes, AR. But are these new?
    E88 N54 w stuff
    F30 335 X-Drive EBII....PPK otherwise Stock
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  4. #4
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    Click here to enlarge Originally Posted by JStang Click here to enlarge
    Are these different than the version that has been around for a few years? If so, any data to show gains between the old and new?
    I'm not sure, that's a good question.
    @ar design
    Chrome Space Bar Issue: http://www.boostaddict.com/showthrea...338#post738338


    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
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  5. #5
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    Same design since 2007.
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  6. #6
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    Well let me say they are quality pipes. The guy who installed mine went out of his way to tell me how perfect fitment was compared to other N54 DP's that he had installed. Keep up the good work guys!
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    PTF Tuned Cobb Stage 2+ | H&R / Koni Sport | BBS LM

  7. #7
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    Thanks for the kind words! Expect roughly 20 whp (more when tuned) out of these when installed!
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  8. #8
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    I installed mine over four years ago...quality pieces and impeccable fitment.

  9. #9
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    ^ Very glad to hear that you're please with them!
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

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    I have the xdrive version, but its so tight that I had to make it fit by force (dent).
    Besides that its a really nice piece of work!

  11. #11
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    I have them installed 5 years ago, and installed many brands, but there is no how are you. the best the market without a doubt. Click here to enlarge

  12. #12
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    Thanks you two! BigHoncho - I'm sorry to hear about your fitment issues... Sometimes they do tend to take a little "adjustment" due to the large diameter lol.
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  13. #13
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    Bump!
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  14. #14
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    le bump!
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    Powering some of the world's fastest BMWs

  15. #15
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    I can't comment on other downpipes but the AR downpipes on my e93 are very well engineered. The fitment was perfect and they are taking the South Florida heat, humidity and lots of abuse in stride. They look as good as the day I bought them.

  16. #16
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    Thank you for the kind words! Glad to hear you're please with them.
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  17. #17
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    Friday Bump~
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  18. #18
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    I had these on my 335 and they were a great piece, you get what you pay for!
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    ESS 6XX kit

  19. #19
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    Thanks bobS! We realize they aren't cheap being hand made, but we strive to deliver some of the best products possible!
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    sales@ardesign.info | tel. 303.351.3515| www.ardesign.info
    Powering some of the world's fastest BMWs

  20. #20
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    Please contact me @ar design
    Chrome Space Bar Issue: http://www.boostaddict.com/showthrea...338#post738338


    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

  21. #21
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    Will do!
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    Powering some of the world's fastest BMWs

  22. #22
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    @ar design I've sent two e-mails with no response. I'll just close this for now but I'll have no choice but to delete everything soon.
    Chrome Space Bar Issue: http://www.boostaddict.com/showthrea...338#post738338


    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale
    : http://www.boostaddict.com/showthrea...r-kit-for-sale

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