Stacks shaking truck

[BSilveira]

I just installed my 5" Grand Rock stacks today. Wow, stacks are unbelievable. When I put the truck in gear they rumble my truck. Is this normal. It's 4" from the turbo and 5" at the y-pipe. The hole in the bed is a lil' bigger than 4". I intalled them at work and was able to drive fast on the freeway for a bit, but had to sit in stop and go traffic for about 35 min.

I wanted to open her up so bad and let out some smoke. I kept reading on here, " once you go stacked you can never go back. " It's true!!! Oo.

 

[Hoefler]

Did you put a section of flex in it?? Since the bed and the frame can move independent of each other, the torque of the engine can take up any clearance you have left in the system.

 

[BSilveira]

It has the flex pipe. The shaking is in the steering wheel and floor. It feels like the motor is put out some serious power.