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  1. #1
    Junior Member Two Rings
    Join Date
    Aug 23 2007
    AZ Member #
    20529
    My Garage
    S4 and ZX10
    Location
    Rocklin, CA

    2.5 in. dp's legal in Cali?

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    Are 2.5 dps street legal in Ca?

  2. #2
    Veteran Member Four Rings lawnferie's Avatar
    Join Date
    Jul 09 2008
    AZ Member #
    30714
    My Garage
    86 bmw r80 airhead. bmw k1200rs
    Location
    Mish/South Bend, IN

    Re: 2.5 in. dp's legal in Cali?

    do you mean TP *testpipe* why would a down pipe be illegal? its after the cat so it doesn't go against any laws that i know of... (assuming you still have a cat)
    Was uns nicht umbringt, macht uns stärker
    lots of goodies
    B5 noggy s4

  3. #3
    Veteran Member Four Rings MacDaddy's Avatar
    Join Date
    Aug 06 2008
    AZ Member #
    31677
    Location
    Canadia

    Re: 2.5 in. dp's legal in Cali?

    Don't know the cali laws, as far as i know everything has to be CARB certified unless its OEM, isn't it?

  4. #4
    Veteran Member Four Rings Rated S's Avatar
    Join Date
    Apr 02 2007
    AZ Member #
    16916
    My Garage
    '01 S4 '94 D21
    Location
    Studio City, CA

    Re: 2.5 in. dp's legal in Cali?

    Theoretically, you changing anything on the car is "illegal."

    Will anyone know if you have a 2.5 or 3" downpipe (if you still have cats)? No.
    SoCalS4.com/Repair - For All Your Delicious B5 S4 Tuning/DIY Needs

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  5. #5
    Registered Member Two Rings
    Join Date
    Mar 05 2008
    AZ Member #
    26091
    My Garage
    2001.5 Black S4
    Location
    SLO, California

    Re: 2.5 in. dp's legal in Cali?

    When would this ever be an issue? Can't imagine being investigated for too large of downpipes
    GIAC Flashed ECU++++FORGE 007 DV's++++ECS 2 piece Front and Rear Rotors++++SS lines++++VOGTLAND GT's

  6. #6
    Veteran Member Four Rings Sleeeper X's Avatar
    Join Date
    Nov 20 2007
    AZ Member #
    22730
    My Garage
    01.5 S4
    Location
    The city with tall BUILDINGS!

    Re: 2.5 in. dp's legal in Cali?

    Quote Originally Posted by j_korteS4 View Post
    When would this ever be an issue? Can't imagine being investigated for too large of downpipes
    Cali is hell for modded cars. Some guy with a 1.8T had his car impounded because of a FMIC. Cali is crazy with some laws because of street racers, and their constant smog
    l gotta-- l gotta get
    a form from a scientist.

  7. #7
    Veteran Member Four Rings RolledMySTi's Avatar
    Join Date
    Jul 06 2007
    AZ Member #
    19342
    My Garage
    2001 S4 Sedan Laser Red
    Location
    San Jose, CA

    Re: 2.5 in. dp's legal in Cali?

    None of the downpipes available for our cars are legal in Cali due to the fact that none of them have a CARB (aka the smog Nazis) EO number. Even piggies are technically illegal in Cali. Does that mean you will get caught? Most likely no.
    01 Laser Red S4 Stage 3 | Vast Fueling | Clutchnet 6 Puck Disk with RS4 PP | APR Downpipes | Aluminum Flywheel | Neuspeed Exhaust | SRM Side Mounts | ECS Pulley Kit | RS4 Airbox | UUC Short Shifter | ST Coilovers| Samcos | AWE DTS Bar | JHM Center Diff | 034 Track Motor Mounts + Street Trans Mounts | Apikol blue rear diff mount and bushings | Areomotive Fuel Pump | ECS 2.0T Coil Conversion | Hooked on Meth

  8. #8
    Registered Member Two Rings
    Join Date
    May 07 2008
    AZ Member #
    28525
    My Garage
    98' Jetta GLX, 68' Coronet
    Location
    Dalton Oh,

    Re: 2.5 in. dp's legal in Cali?

    Thats why living in Ohio is nice. No emissions checks or anything like that.

  9. #9
    Veteran Member Three Rings 2ndEngineS4's Avatar
    Join Date
    Mar 21 2006
    AZ Member #
    10943
    My Garage
    JHM Brewed 00 S4
    Location
    TN

    Re: 2.5 in. dp's legal in Cali?

    I have APR downpipes. I go to Smog-N-Go (the most official testing station ever). I've never had a problem. Nothing is illegal as long as it looks legit. Bling is your worst enemy (ask Frank Lucas).
    JHM.Vast.034.ER.SR.AWE.RS4.Apikol.APR.Innovate.Stg III

  10. #10
    Senior Member Three Rings Muck_and_Grind's Avatar
    Join Date
    Jun 09 2008
    AZ Member #
    29726
    My Garage
    2001.5 Audi S4 (on stands), 1989 Grand Wagoneer, 2007 B9 Tribeca
    Location
    Lodi

    Re: 2.5 in. dp's legal in Cali?

    Quote Originally Posted by 2ndEngineS4 View Post
    I have APR downpipes. I go to Smog-N-Go (the most official testing station ever). I've never had a problem. Nothing is illegal as long as it looks legit. Bling is your worst enemy (ask Frank Lucas).
    exactly. but then again i take my cars to a sponser in Stockton then they take them and they "pass" every time. never had a problem when they take a car but when i took my truck they turned it down because of the k&n open box and the exhaust.

  11. #11
    Junior Member Two Rings
    Join Date
    Aug 23 2007
    AZ Member #
    20529
    My Garage
    S4 and ZX10
    Location
    Rocklin, CA

    Re: 2.5 in. dp's legal in Cali?

    thanks for all the info. I am going to order the ssac exhaust and dp for now until I can afford something nicer. It kinda sucks right now having the car stage 3 with no exhaust mods.

  12. #12
    Junior Member Two Rings
    Join Date
    Aug 23 2007
    AZ Member #
    20529
    My Garage
    S4 and ZX10
    Location
    Rocklin, CA

    Re: 2.5 in. dp's legal in Cali?

    can you check your pms 2ndengines4

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