If i was to put one of the cognito 4-6 inch lifts on a duramax could i run 35's comfortably or would i have to do some trimming or even a bigger lift?

Thanks,
Luke

This is very dependent on what the backspacing of the wheels are. I had to do pretty much trimming to the rear of the front fender and still rub a little bit on hard turns/bumps. If you want to run 35's comfortable go with a 6 inch lift. Just my 2 cents.

Luke, what body style? I am running that setup on NBS.

i just did the 4/6 cognito set at about 5" i am running 34" toyos and had to trim front of valance and inner fender liner and the back inside metal a touch.

A 4-6 will fit 35's at 5-6" ride height but how much trimming will depend on your tire/wheel specs. NBS chevys have a tighter wheel well opening which makes it even more difficult to fit. I would reccomend going to a 7" and not having to worry about your wheel and tire choices.

Well if i go up to a higher lift how much more strain would it be putting on my truck?