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Chevybass Enthusiast

Chevybass

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Looking to put a muffler on a 5.3 2008 silverado. Leaning towards a flowmaster 40. Is it worth waiting to put a full cat back as far as sound goes? Local shop will put a 40 on for 140. Any other way to go? Straight pipe to loud?

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slumpychuck Enthusiast

slumpychuck

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Looking to put a muffler on a 5.3 2008 silverado. Leaning towards a flowmaster 40. Is it worth waiting to put a full cat back as far as sound goes? Local shop will put a 40 on for 140. Any other way to go? Straight pipe to loud?

Had Magnaflow dumped on my 07 5.3. Sounded much cleaner and smoother than the flow master. Not quite as loud but idled much better too.

 

 

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007matman Enthusiast

007matman

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Looking to put a muffler on a 5.3 2008 silverado. Leaning towards a flowmaster 40. Is it worth waiting to put a full cat back as far as sound goes? Local shop will put a 40 on for 140. Any other way to go? Straight pipe to loud?

I did a straight pipe on my 6.0. I thought it was ok, a little drone noise though when going down the interstate and the wife hated it.

 

Bonus, the people in the neighborhood heard me coming from blocks away.

 

We put a turbo-type muffler on there and it was just about perfect. A little louder than stock but told the drone out of it on the interstate and the neighbors could only hear me coming a half a block away. [emoji1]

 

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Chevybass Enthusiast

Chevybass

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Does the inlet and outlet have to match the stock muffler? I have a guy selling 2 40 series with a offset inlet center outlet for 70 dollars. He says they're 2.5in but the box says 2.25. Should I buy them? Will they work with some fitting. Maybe I can work a deal with the muffler shop and have rhem install it in exchange for the other 40series.

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bigchevyz71 Enthusiast

bigchevyz71

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Looking to put a muffler on a 5.3 2008 silverado. Leaning towards a flowmaster 40. Is it worth waiting to put a full cat back as far as sound goes? Local shop will put a 40 on for 140. Any other way to go? Straight pipe to loud?

On 5.3s I love the straight pipes but WITH cats true duals.
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