Since lift kit install front brakes grabbing 08 titan 2wd

Maybe Tires or wheel bearings.

Try calling Nissan dealership

check brake hose,some collapse under braking locking the brake

At the same time or either or? Put your foot on the brakes pedal and switch the trans from drive to rev and see if you get a noise if you do, you may have a loose pad in the carrier which ok someone forgot put it in or you may have a loose carrier bolt pull the wheels and check for safety you don't want a carrier to come off if one bolt falls out it could lock the wheel up if both come out you loose all your brakes. You need to start there

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check with a company called fab-tech they make some pretty good lift kits for 2wd baja rigs. I have bought one of there kits before and made my own. but I like how easy it was to install and function nicely

Do you have 4WD? Usually they dont have very many lift kits for 2WD. All they can give you really is longer leaf springs or blocks in the rear, and spring spacers or taller springs for the front.
As for 4WD, they have the same fittings for the rear, but the front theres a different set up.

If you are mean that only when you put on the brakes you feel a vibration from the steering wheel. Then you need to make sure your front end is tight, or the break rotors are warped which is most likely the case but you should also feel a pulsation in the brake pedal two. You can jack up the front tires grab the tire from top to bottom then do the same from side to side you should notice if there is excessive amount of play, or movement, if not you probbaly just have warped brake rotors that you can have machined or replaced.

Jack up the front end and put stands under it and block rear wheels. Look at axle boots and see if they are cracked. Try turning wheel back and forth sharply and see if you can hear any clicking. Problem could be outer axle joints. If the boots are cracked or you hear a clicking noise you will have to replace the axle. The axle and boot come as a complete unit. Please let me know what you find out.

Check your brake hardwares make sure its in proper places and not loose. you would also want to check the caliper sliders, clean and lubricate with silicon lube. and lastly make sure that rotor backplates are not touching the rotors, you can do this by spinning the rotors while the wheel is off, if it is, then pry the backplates a little. hope this would help, goodluck.!

it might be possible you will have to try the 4x4 websites to find it im not sure if you can put one on a 2wd