I dunno ... I'm baffled, actually .... :o

https://www.f150online.com/forums/ch...e-exhaust.html

MGD

 

airflow restriction

 

Yep , more so than OEM.

 

Chambered/baffled mufflers interupt velocity.

Making your motor have to "push" the gas out even more..



A siphone doesn't work if your hose has a water bong in the middle of it...



I had a thrush system on my truck... They sound very unique... But definatly not a gainer...

 

Yep, that's most important with every configuration, = increase flow velocity, -to asist cylinder scavenging.

 

Same here!!!!

 

Ahh, you guys can do better than that, - 16mpg when everything is perfect, on 265's (MAX).