My truck acts like it's choking out on the freeway when I hit around 80-85mph at 1/4 throttle or a little less throttle, all I have to do is give her enough throttle to pick up speed, if I hold her at 80-85 she's okay. It's almost like she's stumbling over herself as if she's running out of gas?

This is on L2 (60hp)

I am definitely not working her at all...It only happens at the above listed speeds, any other setting/speed/throttle position she's fine? I can punch her in L3 from a stop until I chicken out and she never stumbles.

I know this is since the Quad install, because I took a 800 mile roundtrip prior to install with an average speed of 85mph down I-5 and back with no problems.