Trailboss exhaust screens

[Charlie2019]

So been seeing that if you cover the 6 screens on the exhaust it improves the sound "alittle" my question is between the screens and the flapper inside the exhaust pipe.if you cover those and clamp the flapper open will that affect the motor and your mpg in any way.

[mafd2]

12 minutes ago, Charlie2019 said:

So been seeing that if you cover the 6 screens on the exhaust it improves the sound "alittle" my question is between the screens and the flapper inside the exhaust pipe.if you cover those and clamp the flapper open will that affect the motor and your mpg in any way.

There's already a thread and discussion on this subject.

https://www.gm-trucks.com/forums/topic/224948-20-exhaust-fix-2019-53-z71/

[Charlie2019]

Ok thanks 

[NHAT4]

Yup, used AC duct metal tape...