In reference to the topic, it seems Magnaflow is on to something with the front pipe section. Looks to be a built in resonator system.
They claim “moderate” exterior volume and “mild” interior volume. Judging by the half completed page, it’s damn close to launch. Even has installation instructions with a ZR2.
The MagnaFlow Chevrolet Silverado 1500/GMC Sierra 1500 Overland Series Cat-Back Performance Exhaust System #19626 is engineered to enhance the off-road capabilities, performance and sound of your 2019-2023 Chevy Silverado 1500 or GMC Sierra 1500 equipped with the 6.2L engine option. The high...
www.magnaflow.com
Attached is the “cut in” option to retain the factory tailpipes. But you can see the design of the front section more clearly.
View attachment 4200
Interesting.