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taking the plunge need help

  #1  
Old 08-30-2011, 02:52 PM
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Default taking the plunge need help

Well i am sick of the stock single exaust on the 3.4 LS and finally want to upgrade to dual performance muffler setup. Yes it will cost a lot but iplan on doing it myself and need to know a few things.

1. Where can i get the y pipe to split the exaust
2. what is the diameters of all the piping and what size couplers will i need
3. what inner and outer diameter will i need for the actual mufflers

i dont have another car so I have to make sure everything is 100% perfect fit and finish before I start hacking away at everything. If i mess something up and have to drive around with no exaust it will draw a little too much attention. Thanks for the help fellas. Wouldn't you do the same if you only had a single exaust monte?
 
  #2  
Old 08-30-2011, 03:01 PM
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I believe stock is 2 1/4 but not a 100% on that & id just have a muffler shop build u a y pipe if not than u can prob find one off a ss 3800 in a salvage yard
 
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Old 08-30-2011, 03:11 PM
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Ideally i would like just the y-pipe so i can hack off the stock exaust past the cat. and just clamp the y-pipe section on with a coupler. Now is the number your giving me outer diameter or inner?
 
  #4  
Old 08-30-2011, 03:12 PM
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What's your budget? And why do you HAVE to do this yourself?

The hardest part is going to be putting up the left-side hanger.

Really though, any local exhaust shop should be able to fab you up a complete cat-back with resonator and mufflers of your choice for around $350-$450
 
  #5  
Old 08-30-2011, 03:18 PM
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well the only real exaust shop around here is monroe muffler and they can suck it. They are way overpriced. i will look into it but I cant see it being that cheap. Everything in NY is *** rapeingly expensive.
 
  #6  
Old 08-30-2011, 03:21 PM
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Inside diameter & well i say goto a salvage yard & get everything off a 3800 monte but my exhaust shop did my ubend res delete 2 1/2 to my mufflers for $80
 
  #7  
Old 08-30-2011, 03:28 PM
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Another option. Just go to a shop and have a left side hanger installed. It's a $20 part from GM, should only be a $20 install.

Then you can buy ANY W-Body cat-back and install it in your driveway.
 
  #8  
Old 08-30-2011, 03:34 PM
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well I just called monroe muffler and they said if i get them all the parts they would install it @ $90 an hour. Hmmmm.
 
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Old 08-30-2011, 04:07 PM
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90$ an hour is steep, maybe $90 to put it in & everything but not $90 an hour
 
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Old 08-30-2011, 04:27 PM
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yes it is steep. I want to get dynomax. can anyone give me a link to the dynomax muffler that will clamp right up the the y-pipe?
 

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