I installed an MBRP exhaust about a month ago. I recently noticed that when I try to step on the gas it won't dorp down to get up and go. When I mean step on it, I mean to the floor. I can hear the turbo spool up faster and it will increase speed slowly. I haven't been able to get any black smoke either , any suggestions.

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'04 crew cab LB7
AFE Stage 2 Air Performance Intake
MBRP 4" Stainless Performance Exhaust with down pipe

The exhaust has nothing to do with the black smoke that you probably want to see, witht he flooring it problem and it not going anywhere is just becuase its pretty much still the stock engine and you are expecting it to get up and go with exhaust and intake which pretty much just lower egt's.

If you want the smoke you gotta increase the fuel (injectors,modules, and different timing):thumb:

this isn't an MBRP issue..or an exhaust issue..its just the way a turbo works.. there is usually a little lag. as said above.. get some kind of programmer and you will get the throttle response and smoke you are looking for. With that comes less mileage!! LOL

I could easily change my low boost setting to 5 and smoke out everyone behind me, but for mileage concerns I keep it on level 1...until diesel prices fall back down anyways.