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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1999 regal gs

This will get you started.

viewtopic.php?f=56&t=3208

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WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
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thank you ..

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1999 regal gs

Make sure it is not the harmonic balancer.

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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1999 regal gs

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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