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since it was gutted, my cat now constantly rattles. I think the metal casing inside the cat is loose. :mad: My question is... Will the muffler shop able to weld that metal inside of my cat? Am I going to have to buy a new cat? 
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<i>00\' NBM Firebird~T-5<br />60\': <b>2.29 sec.</b><br />1/4: <b>14.7 @ 95.5 MPH<br />Ask not what your country can do for you, ask what you can do for me.</b></i> -
Check the heat shield above the cat, that rattled like a mother when I put the cat back on before! Might be a cheap fix.C. Boney<br />1997 Firebird 3.8L V6<br />---------------------<br />Modifications:<br /> <br /> SLP Cold Air Induction, Ported/Polished Throttle Body, Carsound 3\" High Flow Cat, Sweet Thunder 24\" Chambered Muffler, Removed Rear Exhaust Section, Custom Fan Switch, 35th Anniv. Silver Stripes, Old T/A-Style Silver Sail Birds -
What kind of exhaust sytstem do you have and what differences have you seen since you've removed the cat? I'm gonna have mine removed when I get new pipes and was just wondering what sound/performance gains you've seen.<b>Black 1996 3.8L Firebird A4</b><br />--------------------------<br />Custom CAI, Flowmaster Dual Exhaust, 160 Deg Thermo, BMR ShockTower Brace<br />JVC mp3 HU, two 12\" Infinity Kappa Perfects, Infinity 6.5\" components, JBL 600.1 & 80.4 amps <br /><a href=\"http://community.webshots.com/album/479229363CPbPiz\" target=\"_blank\">Pics</a>Comment
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i prefer putting a straight pipe. a friend of mine said he could actually hear the exhaust swooshing inside the cat. i guess- my ears arent that good. i had a straight pipe on there and i liked it but i wanted to get the legal look. does your car smoke a lot with the cat gutted? mine smokes now, but i still have bad valve seals.6s.......under the hood or under the belt, they just dont cut it.Comment
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nino - I dunno if you've done any internal work, but I find it hard to believe you have bad valve seals. W/o a cat you may see some "smoke" from unburn fuel until the car warms up(open/closed loop).
I'm running a gutted cat. I've seen improvements in gas mileage and some power. No dyno or track times yet though. With my cutout closed I feel a surge in TQ at 3k, open it pulls much more linear through the rpm range.
Straight pipe would definitely be better.Keith - 99 'maro - White M5 - bumpstick and boltons - 13.65 @ 101 N/A
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