LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

aftermarket muffler fitting in stock setup??

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Old Mar 24, 2003 | 02:37 PM
  #1  
larson_lars64's Avatar
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From: south dakota
aftermarket muffler fitting in stock setup??

I was looking to just get a muffler for my setup and was going to get a flowmaster 80 series, since my car is stock and it's cheap. Well flowmaster has one that will supposedly fit in the stock location and hook right up they say, but how does that work? That muffler is 3" in and dual 2.5" out. I measured my pipes and it comes in at aroun 2.5" and my pipes going out are around 2" inside diameter. So how can that fit, i dont' see how? Anyone ever put one on a stock setup?
Old Mar 24, 2003 | 02:47 PM
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I originally did that to my camaro originally. I used the direct replacement muffler. It was $70 and it was 2.5 In/out and I took off the original tips and put on some nice ones.
Old Mar 24, 2003 | 02:52 PM
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how did that sound for you, and aren't the pipes coming out only about 2"? It also sucks with the muffler welded to the pipes.
Old Mar 24, 2003 | 03:08 PM
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My Flowmaster fit in the stock location. 80 series.
Old Mar 24, 2003 | 04:04 PM
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The stock muffler inlet is 2.75" with dual 2.25" outlets. If you get the Flowmaster muffler with a 3" inlet and dual 2.5" outlets, any muffler shop should be able weld in the new muffler with a few minor modifications.
Old Mar 24, 2003 | 04:05 PM
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Go with the Hooker aerochamber. I have heard nothing but good things about this muffler, and you can get a stock replacement crossflow for it.
Old Mar 24, 2003 | 04:12 PM
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Thanks, i'll look into the hooker. I haven't heard much about it. ANd maybe i'll talk to an exhaust shop to see what they say about welding in a new muffler.
Old Mar 24, 2003 | 06:29 PM
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stevil's Avatar
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Originally posted by larson_lars64
ANd maybe i'll talk to an exhaust shop to see what they say about welding in a new muffler.
I did that, and regret it. Just get a catback, trust me.
Old Mar 24, 2003 | 07:00 PM
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You will see more gains if you put on a cat-back vs a muffler alone. You'll go from 2 3/4 in. I-pipe to 3", and you'll go from 2 1/4" tailpipes to 2 1/2". The cost is more, a Hooker aerochamber is 79.99 through Jegs, and a cat-back will cost $300 and higher depending on what you want. The cat-back can be done in your driveway with hand tools and in some cases a sawzall. I would much rather do that instead of pay a muffler shop to just stick on a muffler. Check into Mac cat-backs, they are a good quality and they are able to be put on with some hand tools.
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