Muffler upgrade that make stock exhaust roar with be abnoxus

[Mango]

Looking to make y 89 burb 5.7 with original cat over 200,000 miles stock exhaust make some sound without lots of drone inside but make notice outside been looking at the flowmaster FX ??

 

[ali_c20]

Flowmasters are known for drone. I had 3 different ones on different vehicles and they droned my brain out of my head at cruise speed. Search Youtube, there are many videos with sounds from different mufflers to get an idea how they sound.

 

[Confused]

The FX is a straight through design,not baffled like most flowmasters. On a single exhaust setup I look for a longer case muffler than the typical 14" case that the FX has.

 

[bucket]

Are you SURE it's the original cat?

I ask because that makes a gigantic difference in exhaust note. So if you have the original cat, the only way you are going to get any rumble at all is to replace the muffler with a straight pipe. And it will still be very civilized.

I found this out back when my buddy had his '91 K5. We replaced the original muffler with a glasspack muffler and it didn't change the sound/volume much at all. Years later I got our '88 Suburban that had the stock converter and stock 3" exhaust, but the muffler had been deleted. It sounded good. It was deep and mellow.

So if you want obnoxious sound levels, that stock converter will absolutely have to go. I'm not saying to run without a converter, just that any modern replacement converter is going to flow much better amd not reduce the sound levels nearly as much.