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Bullet Muffler on Stock I pipe

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Old Jan 25, 2002 | 01:42 PM
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From: Bellevue, Wa
Default Bullet Muffler on Stock I pipe

I am looking to add one of the dynomax bullet style mufflers in my I pipe to quiet down the MAC's I just installed. So far I have only found 2 1/2" or 3" inlet/outlet. My pipe is still stock so it's 2 3/4.

Should a muffler shop be able to expand the stock piping a 1/4" without issue? Also will I screw things up flow wise going 2 3/4 to 3 back down to 2 3/4???

thanks.
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Old Jan 25, 2002 | 01:49 PM
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Default Re: Bullet Muffler on Stock I pipe

one more question.

how much of a db decrease can I expect?

I am hoping it is fairly noticable.
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Old Jan 25, 2002 | 03:42 PM
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Default Re: Bullet Muffler on Stock I pipe

Just get the 3", and your 2.75" will fit in there good, they can expand it a bit to get a tight fit. Not a problem as long as you weld it in. I assume you are talking about taking the stock mufler off & replacing it with pipe? You could do that. I estimate with that setup, you would pick up 7 Hp. If you just put a cutout on there, you would pick up about 10 Hp, and be alot better off $$ wise. JMO.
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Old Jan 25, 2002 | 04:37 PM
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Default Re: Bullet Muffler on Stock I pipe

actually the stock muffler has been gone for over 4 years now <img src="gr_stretch.gif" border="0"> I have a pair of supertrapps instead. But since adding the mac's, even though I do have cats, it's too loud, especially at 2000-2400 rpm. I want to put the bullet in to help quiet things down.
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Old Jan 26, 2002 | 08:12 AM
  #5  
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From: Houston
Default Re: Bullet Muffler on Stock I pipe

Just last weekend I had a bullet muffler
(12" X 3") with 3" pipe all the way back installed. I love it, Shop only charged $75 for bending and I picked up the bullet at MTI for $47. As far as loud goes, it doesnt bother me any. I can still carry on a conversation while driving.
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