New to duramaxs

[coltfourtyfive]

Hello I'm wanting to know if anyone has some data about the before and after replacement of drivers side exhaust with the high flowing type and the dented in factory one
2006 duramax is what I have with a lly
Eighth digit in vin is 2
Thank you

 

[Chevy1925]

search is your friend. marginal difference the butt dyno wont feel nor will ET at a track really see.

 

[zakkb787]

Don’t worry about it unless you’re doing headgaskets. There’s not enough benefit to justify fishing it out with the heads on the truck. Believe me, I just tried.