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if i wanted glasspacks would i need to run TRUE duals for it to sound good?

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Old Aug 13, 2001 | 12:37 AM
  #1  
MattW's Avatar
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
if i wanted glasspacks would i need to run TRUE duals for it to sound good?

just wondering...cuz i love the muscle car sound of them....but i dont really wanna have to spend a lot of money on a custom exhaust


------------------
84TA T-tops L-69 305HO TH-700R4 stock 190hp and 240 ft-lbs.
new best E.T. (dont laugh) 15.986 @84.93mph
old best E.T 15.997@86.04
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Old Aug 13, 2001 | 03:29 PM
  #2  
MattW's Avatar
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From: Greenwood, Indiana
Car: 1984 Trans Am
Engine: Vortec 355
Transmission: TH-700R4
Axle/Gears: GM Axles and GM 3.73
hasnt any one tried this?
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Old Aug 13, 2001 | 04:16 PM
  #3  
x5finger's Avatar
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From: Rust Belt, WI
If you wanted to, you could take out the stock muffler and replace it with a correct length glasspack. If you want it to sound good, and not cheap/crappy, you'll want to get Dynomax/Thrush glasspacks. Others (like cherry bombs) get narrow in the center, hurt flow, and rot out really quickly.

Another idea I have, and what I was planning, was to get the cheap full length Hedman headers, and bolt on some header glasspacks (Thrush or Purple Hornies). I could use a Z connector that is advertized in Jegs if I was hitting the tranny. I'd just use turndowns to direct it out the sides, and maybe run side exhaust pipes if clearance was good. Anybody else tried this?

-5
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Old Aug 13, 2001 | 07:06 PM
  #4  
AJ_92RS's Avatar
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Joined: Apr 2001
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From: USA
Car: yy wife, crazy.
Engine: 350, Vortecs, 650DP
Transmission: TH-350
Axle/Gears: 8.5", 3.42
Glass packs sound best on seperate pipes. They each will have different pulse timing than the other and that is what makes them sound so cool.

I used to have a 65 Merc Comet (ie. Ford Fairlane) that had one GP behind a 289cid. It sounded pretty good for what it was. I think the fact of having such a small engine helped to keep the thing from loading up and sounding like crap though.

Later on though, I had an 81 Malibu with that little 267cid/V8. It had dual GPs off the stock ex. mans. and it sounded great. If done right, GPs will sound good. Just my 2¢.

If you are planning on changing the muffler no matter what, then just get a GP and slip it on there without clamping it down, and listen to it like that. I did that many times just to get an idea if it would sound good. Then if I no like, I take back!!!!

AJ
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