So recently I had my LT Headers done to a true dual and made a custom CAI Intake

( credit: https://dodgeforum.com/forum/3rd-gen...-included.html )

Before this I have had my truck up to 120 with no problems, and not shaking at the 100 - 110 range. (The shaking goes away after 110 currently)

My question is what would cause this? I have read all my diagnostics, did the CAI right, checked my lug-nuts, and a few other components. Does anybody have any Ideas what to do next? Is this common? (and I already know I shouldn't be going this speed)

 

Are your tires rated for that speed mine does the same thing around those speeds

 

Do you have the original crap tires? My 03 was actually governed to 105mph because of the non-speed rated tires.

 

Can't see how any of what you've done would cause that. I'd look to thrown wheel weights or out-of-round tires (wheel weights first).

 

rotors could be slightly warped and off balance. I know when i recently replaced all 4 of mine it made a world of difference

 

I have Pro Comp A/Ts in P275/60R20/REIN. Will check wheel weights tomorrow, and will look into the rotors. Thank you for your advice guys. BTW, my truck is governed at a buck forty

 

I can't say that I know (and will likely never find out) or not whether my truck does the same at those speeds, but I would start looking at everything that rotates. Wheels, tires, u joints, or roters.

 

How about slow down, its a truck. Just sayin....

 

I know, haha. It's just so much fun for me. But I shan't be doing that too much more, at least until I figure out what causes this.
My favorite thing though is when I beat all my buddies ricers, and pass them. I took a Turbo'd VW Jetta the other day