Best sounding muffler for 5.3?

[Black Beast5059]

I have a 2019 Tahoe 5.3 with a 2.9l whipple, corsa long tube headers, and the Chevy performance borla catback. I’m pretty happy with how my current exhaust setup sounds especially at WOT. I just feel the idle with the borla mufflers is a little quieter than I would like. I don’t want anything crazy loud and obnoxious as it is my daily. I just want something that has a nice deep v8 tone which the current borlas I have are lacking.

 

[B-train]

I have been a fan of Flowmaster over the years. The last one was on a 96 k1500 with the 5.0L. It was a 40 series I believe. I haven't tried one on a LS motor however. I have used mafnaflow, but has droning issues. When they changed the firing order on the LS motors, it seems harder to find a muffler that gives a nice rumble. I think as long as you get a muffler that has a balance pipe built in, the drone isn't an issue.

 

[swathdiver]

Listen to some Corsa systems and MBRP mufflers.

 

[tom3]

Run straight pipes. The cat. converters make pretty decent mufflers and larger diameter pipes make for a pretty good sound. Guys (young guys) do that with trucks around here.

 

[SpineDock]

I have a 2019 Tahoe 5.3 with a 2.9l whipple, corsa long tube headers, and the Chevy performance borla catback. I’m pretty happy with how my current exhaust setup sounds especially at WOT. I just feel the idle with the borla mufflers is a little quieter than I would like. I don’t want anything crazy loud and obnoxious as it is my daily. I just want something that has a nice deep v8 tone which the current borlas I have are lacking.

What did you end up going with?
If you’d like to sell the Chevy performance cat back system then let me know!

 

[shaunbolten]

I put a MBRP stainless cat back system on my 2017 5.3, great rumble at idle and beautiful plane through the RPM ranges. Definitely opens it's throat up from 3,300-6,000 RPM's. All the while retaining a nice groan that doesn't give you a headache at highway RPM. Installed myself in about two hours. All plug and play parts. Best part is it was only $500 with shipping to the house and I only needed a socket set to install it.

 

[Ibustbravo]

I have the flow master 70 series 'big block' muffler on my 15 Yukon.. I like it.. It's a mellow rumble. And... I can hear my wife coming from up the street.