Try searching for it, theres plenty of already made threads about disscussion and information about different intercooler setups for d22s (assuming you have a zd30 d22) theres both aftermarket kits and diy kits. Most premade kits are atleast well over the $1000 price tag, such as the ase front mount kit, the cross country top mount, the denco water to air. Then others have made their own kits, some using xr6t intercoolers etc.
But yeah before starting a new thread try searching for what your after. As i said theres already plenty of threads that discuss just about everythin you need to know about putting a intercooler on your nav. Might seem rude of me to say but many have given the same advice to other before. So that the forum doesnt get clogged up with multiple threads on the same topic.
Anyways welcome to the forum, also maybe start a build thread of your navara and introduce yourself.
Bart