It's not cheap but it looks like it's complete unlike Rimmer and Avenger kits were. The 5th injector is a better way to do it especially for a YJ which can't take a tune. THe pictures seem to be old and the detailed description is a cut & paste of the 4.0L.
https://www.youtube.com/v/IWUyswgOErkhttps://www.boostedtech.com/superchargers/jeep-wrangler/wrangler-yj-2-5-liter-4-cylinder-supercharger/?v=402f03a963bahttps://www.boostedtech.com/superchargers/jeep-wrangler/wrangler-tj-2-5-liter-4-cylinder-supercharger/?v=402f03a963ba$3,295.00
DescriptionSafe, reliable, affordable.
Low boost, instant boost, no lag
Easy install, 4-5 hours typical install
*4-6 pounds boost on the stock 2.5L
Utilizes heavily modified GM 3.8L Eaton M90 rotors for reduced displacement
Rotor pack and nose drive are easily rebuildable
Retains A/C! No relocation of any engine components, uses stock tensioner pulley
Fully compatible with all bolt-ons, 62-70mmTB, cat back exhaust, 703/784 injectors, roller rockers, even cam and ported big valve heads
Completely stock EFI settings and function when not in boost
5th injector, 60lbs/hr, provides additional fuel under boost and liquid intercooling effect
Split Second FTC controls boost timing retard and auxiliary 5th injector control
Split Second FTC is fully laptop programmable
Split Second FTC comes with base tune pre-loaded
Split Second FTC clamps MAP sensor to prevent CEL’s
Split Second FTC must be hardwired