Dual MBRP Exhaust - 08 Sierra

[94landcruiser80]

how can you deactivate the cylinder drop out (active fuel management)? nice truck though good sound

[cucdude]

@94landcruiser80 Hey sorry for the late response... but if you still want to know, I bought a Diablosport Predator tuning device (plugs into a slot below the steering wheel where they read diagnostic codes etc.) and you can turn off the AFM. It also allows you to fine tune your engine a bit. I don't know much about engines, so that proves that the Predator is idiot-proof too. Haha! Hope that helps.

[MudLite26]

any gas mileage decrease?

[cucdude]

@MudLite26 actually, with the combo of this exhaust, my cold air intake and a Diablosport programmer I saw little or no gas mileage decrease. In fact, when it was all dialed in properly I found my mileage might be better when I turned off the "Active Fuel Management"...

[fortplainman]

seems like the straight back exit that i have is a tad louder.  is that the t-409 stainless steel kit or the t-304?

[cucdude]

This is the mid level - I guess thats the t-304 XP series. Might be that its louder when you're behind it? I feel like this one is louder in the cab because the pipes aren't facing straight back so the sound is projected more towards the cab... if that makes sense.

[WBOS72]

how is the sound in the cab?? i have an 04 GMC 1500 CC and I want the single system.

[cucdude]

It can drone a bit in the cab when its cruising around 80-100km/hr. But it might be because it is a dual system that turns out to the sides... I have the DoD system, but I bought a tuner and turned it off because it sounded like shit when it kicked down to V4 - but your truck wouldn't have that problem.

[ekperformance1]

thats the perfect sound man. do you think it would sound good on 2500hd with the 6.0?

[cucdude]

Thanks! Hard to say, the engines will sound different, and all the exhaust systems are different too... but I am really happy with it.

[cucdude]

Haha, no not when I'm driving, just revving it up. :)

[Bajasunsport]

@cucdude Just bought the mid level cool duals system like this myself. Install later this week.