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  • new to mi. CAT Delete

    hello im new to mi. and im a proud owner of a 1999 TA for a week now.
    can I remove my cats to get the sound I want, and should I remove them?
    its bone stock for now, I want that growl.....
    I heard that we don't need cats in mi,

  • #2
    Yes and yes
    - Brian Meissen
    Owner, MiFBody.com
    Administrator, LTxTech.com


    1994 Camaro LT1 Transplant - 357ci LT1, cammed, stalled, and driven.
    2022 Camaro LT1 - "Cherry Bomb 2"
    Michigan FBody Meet & Greet Car Show 2022
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    • #3
      Many shop wont do it as its illegal for them to do so, however tons of people including myself have done it.
      -Joel
      1995 Z28 M6 - AI226/234 - autocross ricer
      1984 Scottsdale K10 - 305/4bbl/4spd


      WTB List:Midwest Chasis DS Loop

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      • #4
        I done this before and I couldn't stand it. I actually ended up putting the cats back on. If you really want an aggressive growl you should save your pennies and buy long tube headers and a off road y-pipe and you won't regret it. Long tube headers really helps. If you don't want to do that the LM1exhaust system sounds great.
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        • #5
          If you really want an aggressive growl..True duals..if you love rasp.. Y pipe


          But yes cats do not belong on these cars..take off, call it a dirty name and throw them as far as you can...actually go pick then back up and scrap them for some $$$

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          • #6
            Cats, wasnt that a musical? we done need no stinking cats!

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            • #7
              Remove it sure. Avoid hollowing out the stock cats. You'll get some horrible resonance from the turbulence and volume change.
              Adding power makes you faster on the straights. Subtracting weight makes you faster everywhere.

              For six days work may be done, but on the seventh day, you shall have a track day, a Sabbath of competing, to time the FIREBIRD; whoever does any work on it shall be put in last place.

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              • #8
                Originally posted by nooncha View Post
                Remove it sure. Avoid hollowing out the stock cats. You'll get some horrible resonance from the turbulence and volume change.

                X2 with what Robert said.

                IMO the only proper way to remove cats from a car is to get the Longtube and off road y-pipe combo and ditch them that way.
                1997 Trans Am
                T56 swap. LS1 Cosmetics

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                • #9
                  new to mi. CAT Delete

                  Originally posted by BP_Z28 View Post
                  If you really want an aggressive growl..True duals..if you love rasp.. Y pipe :
                  If you want to lose a lot of ground clearance... True duals. If you want to keep your ground clearance.. Y pipe
                  I think your the only one bothered by rasp Rolo. With any exhaust set up you will always have exhaust rasp. Either way long tube headers with no cats sounds amazing. I would recommend doing that over just cutting off the cats.
                  Last edited by the_dragon; June 16th, 2014, 09:13 AM. Reason: typo
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                  • #10
                    Im lowered with 3" duals and i still have pretty good ground clearance. All depends how good your exhausr guy is at tucking.
                    -Joel
                    1995 Z28 M6 - AI226/234 - autocross ricer
                    1984 Scottsdale K10 - 305/4bbl/4spd


                    WTB List:Midwest Chasis DS Loop

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                    • #11
                      ^^good to know. If I ever decide to get true duals I'll have to have your exhaust guy do it.
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                      • #12
                        new to mi. CAT Delete

                        I'm also lowered but with 2.5 duals. Zero ground clearance lost.


                        Shawn there is a fine line with rasp and no rasp. Damn near every ORY set up will rasp with no cats. There is no way on hiding it unless you keep it under a certain RPM. Leave cats on and the rasp reduces greatly. There is nothing amazing about the sound of dkfiwkrnfosnwntifn bouncing in the RPM range haha.

                        If you do however remove the cats, be prepared to wear the new men's fragrance called !CATs. It's very manly



                        Take a stroll to the exhaust sub topic and listen to the members cars in the sticky. You will get a good view on what it will sound like when you remove them. Or ls1sounds.com





                        Sent from my iPhone using Tapatalk
                        Last edited by BP_Z28; June 16th, 2014, 10:35 AM.

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                        • #13
                          I've never run a stock car without cats, but I don't like catless LS1s with longtubes. I added high flow cats to solve that.
                          1994 Z28 - 2002 M3 - 2015 1.0T Mileage Accumulator

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                          • #14
                            nothing i own has a cat.

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                            • #15
                              Originally posted by BP_Z28 View Post

                              If you do however remove the cats, be prepared to wear the new men's fragrance called !CATs. It's very manly
                              LMMFAO, so true, so true...
                              2000 SS Convertible #1414 - Light Pewter 6 Speed

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