Mark Johnson

iTrader: (1)

Hey guys- after cutting out the flapper on my 2016 Sierra 5.3 and tweaking the transmission I'm looking to replace the muffler. I'm at the crossroads of the Borla Touring and the Flowmaster 50 series(SUV with attitude). The sound I'm looking for is that of the 2013 Denali. I'd like to retain or even enhance the low end torque as I don't really wring it out regularly. Any wisdom, insight, experience and advice greatly appreciated...……….
TIA

Resolute_welding

iTrader: (1)

My vote would be for a big body magnaflow. I know that's not what you're originally looking at, but it was my favorite option for my l96 until I did a Gibson catback.

madmann26

iTrader: (7)

I use a big body Borla #19131346. It’s the GMPP muffler without GMPP on it.

Nice sound, no drone.

I would call and ask them if they have something comparable to it in 3.5” .

ss4chad

iTrader: (19)

https://spintechmufflers.com/8000-truck-rv-muffler/
Best mufflers on the market, IMO.

I have this one on my truck;
https://spintechmufflers.com/5000-sport-truck-suv/
I did the Dual In/Out with 3" entering and 2 1/2 exiting. I have LT's into 3" Dual Cats, into the 3" X Pipe, into a 3" dual muffler, out as 2 1/2 over the axles and out behind the right tire into 3" polished tips. Sounds great with my stroked 383. Could not have asked for a better sounding muffler, quite at city speeds, brutal at WOT!!

Chad

arthursc2

iTrader: (5)

Magnaflow 12909

Only suggesting it because I spent money on it, so I think its the best pile of poo out there

But truthfully, it sounds good and doesnt rattle like my OE 6.2 muffler started doing

Mark Johnson

iTrader: (1)

Thanks, Mad- what year truck ya got and size engine? I know you may have mentioned it some time past but never registered...………...

madmann26

iTrader: (7)

2006 xcab Sierra.

TMS 370 with 706 heads.

Mark Johnson

iTrader: (1)

Thanks mad, I'm leaning heavily toward the Borla you've mentioned which BTW has a new PN 401158. I really like the measurements on it. Y'know I had a Flowmaster 70 on my 2006 and sound was a smidge over stock but gave a noticeable SOTP off the line but then was about the same everywhere else...…………….

Mark Johnson

iTrader: (1)

Hey guys, thanks for y'alls input. I dropped the hammer on the round Borla. I'll post up when it gets here and installed...…………...

madmann26

iTrader: (7)

I hope you like it. I love mine.

It’s deep/subtle at idle and has that Borla sound at WOT.