MBRP DROAN

[beck]

I just installed an MBRP 4 in. cat back exhaust and predator on my 05 Duramax.
I love the predator, but there is a droan at low speed and idle on exhaust. Does
anyone know of a fix. If I have to go back to the stock exhaust,what settings are safe to use with the Predator. Steve

[mikel]

The drone is definitely a result of the exhaust.
The stock exhaust will be fine with the towing or economy tunes, but I'd watch the EGTs with the Performance and extreme tunes.

Thanks