for you guys that are running a 4" or cat delete, catless exhaust did u get a nasty or overwhelming drone inside the cab, i have heard with a 5" guys have but i am installing a 3.5" down pipe that will connect into my 4" banks duel exhaust, thanks

personally no drone at all, and i have a 4" turbo back MBRP, but some guys on here get bad drone so i think it varies

had a drone in my 07 LBZ and was a bit noisy .. I put a resonator in (also have the BD exhaust brake mounted in the front) and the drone I had at 55-60mph is gone ... it's still louder than stock in the cabin when I floor it but no too bad ... it's a throaty noise and acceptable .. I would not like it without the resonator .. also make sure you use wider band clamps and tighten them good .. then your ok ...
good luck
gmd

I have 0 Drone with my Corsa DP-Back. With the windows and roof closed, I hear the Intake WAY more than the Exhaust.

My drone is at idle, and it is only bothersome when the doors are open...better when only the windows are open...nothing when the truck is buttoned up.

A Buddy of mine gave me the 4 inch Magnaflow off his CC Dually...if it is for free...it is for me! ;)

well i did it today and i put a GM performance down pipe on 4" no drone at all no codes at all (knock on wood!!!) the power difference is huge, sounds alot better, and the turbo screems now, and i still have my warranty witch is the best part, Thanks guys

[quote=Bradley James;2009425;]personally no drone at all, and i have a 4" turbo back MBRP
X2

well today i got on the highway going through a construction zone when its in 6th gear and low rpms and low speed like 55 there is a slight drone very very slight tho, u need to turn the radio down to hear it,