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 Post subject: 1998 gtp
PostPosted: Fri Mar 05, 2010 9:46 pm 
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Location: muscle shoals, alabama
Year and Trim: 1999 regal gs
i just got a 1998 gtp with 166,000 miles. i think the supercharger is making a noise how do i replace the coupler ..it is a rattling sound but not all the time just at idle.

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Last edited by Adam Marcum on Fri Mar 05, 2010 9:52 pm, edited 1 time in total.

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 Post subject: Re: 1998 gtp
PostPosted: Fri Mar 05, 2010 10:28 pm 
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This will get you started.

viewtopic.php?f=56&t=3208

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 Post subject: Re: 1998 gtp
PostPosted: Fri Mar 05, 2010 10:49 pm 
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Location: muscle shoals, alabama
Year and Trim: 1999 regal gs
thank you ..

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 Post subject: Re: 1998 gtp
PostPosted: Wed Mar 10, 2010 7:11 pm 
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Make sure it is not the harmonic balancer.


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 Post subject: Re: 1998 gtp
PostPosted: Wed Mar 17, 2010 5:58 pm 
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Location: muscle shoals, alabama
Year and Trim: 1999 regal gs
Ok it was the coupler. now on to other stuff?what size is the exhaust were it goes into the cat..i have found a d/p with cat it goes from 3"tell it gets to the cat then it is 2.25for the high flow cat then back to 3" with the u bend delete.. will it work for my car? or should i find a full 3" set up?and do stock muffler flow good? i don't wont a loud car... i wont to drop to a 3.6 or 3.5 pulley can i with the d/p ..fwi..and colder plugs and a 180 t-stat..and do i have to have the pcm tuned ..right now i have no KR..

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 Post subject: Re: 1998 gtp
PostPosted: Wed Mar 17, 2010 6:33 pm 
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Get a full 3" DP/cat. Your exhaust is only as good as its weakest link, currently that's the U-Bend, and with that setup it would be the cat. If you kept a stock muffler, your exhaust would still be quiet, with just a little more roar at WOT and at cold idle.

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