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Thread: smog legal cat back xpipe (CA.)

  1. #1
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    Exclamation smog legal cat back xpipe (CA.)

    a bud of mine offered to make me a custom catback xpipe. but im not sure they are smog legal here in Nazifornia. something about aftermarket cats being illegal. could i use the oem cats on the xpipe ? or how would i go around doing this
    help anyone?
    2003 Mercury Marauder 300A
    #4821 of 7838
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  2. #2
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    be ready for the Xpipe drone
    "Steps"
    Steve Luty
    Ponte Vedra, Fl.

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    Quote Originally Posted by STEPS View Post
    be ready for the Xpipe drone
    Justbob has an Xpipe and there is no drone.





    Great quotes!!
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  4. #4
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    As long as what you modify stays behind the back-most catalytic converters, there should be no emissions trouble. However, I don't know laws regarding modification of exhaust for sound levels. I just know you aren't supposed to even relocate factory cats from the factory installed positions, they HAVE to be there and they HAVE to be in the factory position for them to be fully legal.

  5. #5
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    Quote Originally Posted by MrBluGruv View Post
    As long as what you modify stays behind the back-most catalytic converters, there should be no emissions trouble. However, I don't know laws regarding modification of exhaust for sound levels. I just know you aren't supposed to even relocate factory cats from the factory installed positions, they HAVE to be there and they HAVE to be in the factory position for them to be fully legal.

    If I run the same size as the oem H pipe and use the cats off it for the x pipe would It keep me out of trouble.would there would be no point of swaping. Would the sound level be the same?
    2003 Mercury Marauder 300A
    #4821 of 7838
    Stock block marauder
    400hp 440trq

  6. #6
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    Leave your cats just do a magnaflow universal x and 18" magnaflow meg deletes. Kali aftermarket cats must have an EO number stamped on the cats.
    2003 Mercury Marauder 300A
    FRPP BOSS50 Block w/MMR 900S Stroker 5.3L DOHC 324ci 10:1cr - (321rwhp/360.5rwtq) - Tuned by AED

    2006 Ford Mustang GT
    FRPP FR3 Handling Pack|FRPP X Pipe w/GTA Exhaust|Steeda CAI|Hurst Shifter
    (289rwhp/307rwtq)

    2003 Chevrolet Suburban 2500 LQ4 6.0L LT 4WD
    Cognito leveling Kit, Fox 2.0, BFG KOA2 Radial All Terrains, Magnaflow, K&N and 4.10 gears

  7. #7
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    Quote Originally Posted by dohc324ci View Post
    Leave your cats just do a magnaflow universal x and 18" magnaflow meg deletes. Kali aftermarket cats must have an EO number stamped on the cats.
    might have to end up doing that my friend is doing a custom catted xpipe for me for less then half that price. Just wanted for it to be smog legal
    2003 Mercury Marauder 300A
    #4821 of 7838
    Stock block marauder
    400hp 440trq

  8. #8
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    Quote Originally Posted by dohc324ci View Post
    Leave your cats just do a magnaflow universal x and 18" magnaflow meg deletes. Kali aftermarket cats must have an EO number stamped on the cats.
    Even with the CARB number, isn't it still mandatory that they be placed in the factory position, basically having them on paper be only replacement cats?

  9. #9
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    Quote Originally Posted by bigmerc281 View Post
    might have to end up doing that my friend is doing a custom catted xpipe for me for less then half that price. Just wanted for it to be smog legal
    If he leave your cats and fabs the rest then it would.

    Quote Originally Posted by MrBluGruv View Post
    Even with the CARB number, isn't it still mandatory that they be placed in the factory position, basically having them on paper be only replacement cats?
    Yes. But the new cats also are stamped with the EO#. I spoke to a local shop owner and the state does drop in inspections; they literally pulled all cats from the shop with no EO# (he keeped a few). Most smog techs have no clue but every year it's harder and harder to get away as the state is stepping up their compliance efforts particularly with fines to shops.
    2003 Mercury Marauder 300A
    FRPP BOSS50 Block w/MMR 900S Stroker 5.3L DOHC 324ci 10:1cr - (321rwhp/360.5rwtq) - Tuned by AED

    2006 Ford Mustang GT
    FRPP FR3 Handling Pack|FRPP X Pipe w/GTA Exhaust|Steeda CAI|Hurst Shifter
    (289rwhp/307rwtq)

    2003 Chevrolet Suburban 2500 LQ4 6.0L LT 4WD
    Cognito leveling Kit, Fox 2.0, BFG KOA2 Radial All Terrains, Magnaflow, K&N and 4.10 gears

  10. #10
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    Quote Originally Posted by dohc324ci View Post
    If he leave your cats and fabs the rest then it would.
    would there be a difference sound. Or would
    it sound the same as it did if it were the stock hpipe.
    2003 Mercury Marauder 300A
    #4821 of 7838
    Stock block marauder
    400hp 440trq

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