Everything you listed is a waste of money. TB spacers do nothing but give shit looks with piss poor performance. Is headers really worth a couple horsepower for the price in my opinion, no there not! A new exhause system, if yours is in need of being replaced yes I would. Does all this work add up to a noticeable difference yes and no. People have different experiences and opinions. Just mine but sure most will agree.
Dont change the injectors, its not a diesel, no chips, its a 4 cyl, not a drag car. As for your cold air intake. Scrap it and get a OEM box, filter, and fittings from a junk yard off another jeep. Big waste of money and time!
If you want to burn tire, go fast and take corners sell it and buy a mustang!
Save your money for a lift, tires, and lockers!