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  • cat is rattling

    There is a cruddy noise coming from my cat. This is the 2nd time it has happened.

    I have a 80 series Flowmaster muffler on there and would that have anything to do with my cats going bad?

    I am also interested in a high flow cat. What is a good one to get?
    2000 M5 SILVER FIREBIRD<br />*Flowmaster 80<br />*K&N air filter<br />*SLP LCAs<br />*Fast Toys CAI

  • #2
    a good but expensive one is a random technology cats, cheaper but high flowing ones are catco and carsound cats
    1995 Firebird (3.4) <br />Eagle 18\" 077<br />Flowmaster 80 (2.75\") series exhaust<br />2.5\" Car Sound Cat<br />K&N Cold Air Intake <br />Alpine 12\" Type E Sub<br />Bazooka EL 1500 Amp<br />Pinoeer deh4400 and Aftermarket Speakers<br /> <a href=\"http://www.sounddomain.com/id/fbird\" target=\"_blank\">http://www.sounddomain.com/id/fbird</a>

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    • #3
      Random Tech #616806 434 cfm
      Car Sound #93009 428 cfm
      Car Sound #94009 417 cfm
      Walker #15147 391 cfm
      Random Tech #616549 355 cfm
      Catco #6007 350 cfm
      Stock LS1 304 cfm
      Stock V6 250 cfm (Give or Take)

      The Car Sound 94009 I found a guy selling them on ebay, just look up carsound, he has a lot of models you can get them for about $50-60. IMO the catco's are peices of ****. Why not just buy the carsound for the same price? That way you won't have to replace your cat 20billion times.

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      • #4
        im not too knowledgeable about car terms... what does cfm mean?
        2000 M5 SILVER FIREBIRD<br />*Flowmaster 80<br />*K&N air filter<br />*SLP LCAs<br />*Fast Toys CAI

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        • #5
          honestly im not sure but i beleive it has to do w/how much air flows through the cat, but honestly get a carsound cat, its cheap, efficent, and long lasting
          1995 Firebird (3.4) <br />Eagle 18\" 077<br />Flowmaster 80 (2.75\") series exhaust<br />2.5\" Car Sound Cat<br />K&N Cold Air Intake <br />Alpine 12\" Type E Sub<br />Bazooka EL 1500 Amp<br />Pinoeer deh4400 and Aftermarket Speakers<br /> <a href=\"http://www.sounddomain.com/id/fbird\" target=\"_blank\">http://www.sounddomain.com/id/fbird</a>

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          • #6
            cfm = cubic feet per minute.

            and if you're cat is rattling, it's done. get one ASAP!
            2011 Camaro LS 6M, in black.

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            • #7
              Thanks for the info guys. This site kicks *** !!!
              2000 M5 SILVER FIREBIRD<br />*Flowmaster 80<br />*K&N air filter<br />*SLP LCAs<br />*Fast Toys CAI

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              • #8
                Before you go and change your cat....make sure the clamp from the S to I pipe is tight. Quite a few people have found this to be a problem when they thought the cat was bad.
                <a href=\"http://www.onid.orst.edu/~waltejam/\" target=\"_blank\">98 Bright Red Camaro</a><br />Too many mods to list....check my website

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                • #9
                  I've had my catco cat over a year now with no problems. I highly doubt you'll see better results with a $100+ cat compared to the $50. If money isn't a issue for you, go with the most expensive cat. Otherwise, go with catco. ;)
                  <b>99 Camaro Z28 A4</b><br />R.I.P. 00 Firebird 3.8<br />14.89 @ 90, 2.03 60\'

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                  • #10
                    ditto on the catco...summitracing is where I got mine...works great.

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                    • #11
                      shortdog - the carsound 94009 is the same price as the catco, flows better, and is constructed better.

                      [ June 08, 2003: Message edited by: Ted ]</p>

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                      • #12
                        Make sure its the cat.
                        I had a rattle on my v6 and thought it was the cat. Replace it and the rattle was still there.

                        Turned out the "Y-Pipe" coming off the manifolds was ratteling. There is a smaller pipe inside the outer shell. That is not made of stainless steel and WILL rust out eventually. Replaced it, and no more rattle.

                        Good luck
                        [img]graemlins/thumbsup.gif[/img]
                        <a href=\"http://www.pbase.com/danny83/car_pix\" target=\"_blank\">http://www.pbase.com/danny83/root</a><br /><a href=\"http://community.webshots.com/user/ttopbird96\" target=\"_blank\">http://community.webshots.com/user/ttopbird96</a> [/URL]<br />00 NMB Formula M6<br />323.4HP, 336.5TQ<br />Lid, Filter, Cutout, all else stock :)<p>\"Let the modding begin!\"

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                        • #13
                          <blockquote>quote:</font><hr>Originally posted by Ted:
                          shortdog - the carsound 94009 is the same price as the catco, flows better, and is constructed better.<hr></blockquote>
                          I checked on ebay and you're right. [img]graemlins/thumbsup.gif[/img] It didn't show a part number though, but I guess it don't matter. Everywhere else was asking around $100.
                          <b>99 Camaro Z28 A4</b><br />R.I.P. 00 Firebird 3.8<br />14.89 @ 90, 2.03 60\'

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                          • #14
                            is it the cat or the heat shield? if its just the heat shield rip it off.

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                            • #15
                              What is the stock length of a 3.4L cat?

                              Since the carsound cat flows more, my exhaust note should be deeper/louder right?
                              1995 Camaro 3.4L<br />dynomax super turbo muffler<br />SLP CAI<p>It\'s red so it must be fast!!!

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