Force-feed your engine with either a supercharger, turbocharger or nitrous oxide kit. This is the single most effective method to achieve a large torque increase from your engine without increasing the engine displacement. This is real bolt-on power without needing to modify the engine internally. For the ultimate horsepower/torque increase, you can even add any of these power adders to your stroker engine.

NEW Turbo kit from 505 Performance fits 87-03 Jeep Wrangler and Jeep Cherokee 89-99 with 4.0 HO.
Requires relocation of battery and some modification of the AC components.
Garrett SuperT 60 Modified Turbo air cooled 6.5psi maximum boost
Fuel management system from Split Second
Complete Exhaust from header to converter
All Stainless or quality braided hoses
Stainless T-bolt Clamps
Oil pan-gasket one piece
Boost Gauge and hardware
All necessary air intake system including high flow K&N
Stock TJ: 148.8rwhp/191.3rwtq
Turbo TJ: 214.2rwhp/280.7rwtq

The Sprintex Supercharger System for Wrangler TJ is an easy, completely bolt-on, self-contained oiling system installation with no need for external oil lines. 42% more horsepower; 152 HP stock to 216 HP supercharged and 34% more torque; 193 ft/lb stock to 259 ft/lb supercharged. Engineered and tested to OEM specifications. Uses stock air filter housing. Completely reversible. High-quality materials and finishes. S5-210 ultra-efficient twin screw compressor for more power at lower RPM. Performance & Reliability may vary on vehicle condition and modifications, etc.

Sprintex 257A1005 SPRI Supercharger System with DiabloSport Tuner for 05-06 Jeep Wrangler TJ & Unlimited with 4.0L

Cherokee 4.0 Liter 6 Cylinder Side-Mount Supercharger

No hood modification necessary!
Custom intake manifold included
Safe, reliable, affordable, ‘plug and play’
Low boost, instant boost, no lag
Easy 4-6 hours typical install
*4-7 pounds boost on the stock 4.0L
Works and has been tested at all altitudes
Utilizes a modified GM 3.8L Eaton M90 supercharger
Rotor pack and nose drive are easily rebuildable
Retains A/C!  No relocation of any engine components, uses stock tensioner pulley
Will work for ‘strokers’ 4.5+L engines, but expect lower boost, +20-25% increase power
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
7th injector, 60lbs/hr, provides additional fuel under boost and liquid intercooling effect
Split Second FTC controls boost timing retard and auxiliary 7th injector control
FTC is fully laptop programmable
FTC comes with base tune pre-loaded
FTC is legal only for racing vehicles which may never be used upon a highway

* altitude dependent. unit comes with standard pulley, higher boost pulleys can be purchased under accessories.

Wrangler TJ Supercharger 2005-2006 Wrangler TJ 4.0 Kit from RIPP Superchargers. This kit now features a state of the art and innovative Water To Air Intercooler, with built in water tank, By Pass Valve flange and air intake temp grommet. This unit will easily cool the 8psi peak in any environment. The GEN2 now features 6 larger primary injectors, plug and play map sensor and Pre-Programmed Diablo Sport Intune for re-flashing of the ECU.

Power, Drivability, and, Reliability: these three words sum up the RIPP SDS Supercharger Drive System (SDS). The RIPP SDS will deliver a smooth and linear boost curve that does not shock your engine or drive-system the way a turbocharger or roots system would. RIPP's unique approach to product development brings together a system with the level of refinement that your Jeep has been waiting for. Pumping new life into the veins of your vehicle with every revolution! The power added will bring out the performance you lost when you added wheels and tires and then deliver more.

The kit includes:
Water To Air Intercooler with built in water tank
By Pass Valve flange and air intake temp grommet
6 larger primary injectors
plug and play map sensor
Pre-Programmed Diablo Sport Intune
49 State Legal Not for Sale or Use in CA

Breathe new life into your Jeep with the all-new Banks Sidewinder Jeep Turbo System. This complete bolt-on system is engineered for ultimate performance and rock crushing capability. The Banks Sidewinder Turbo System transforms your 1999.5 through 2006 Jeep Wrangler into a pavement eating, rock crushing, trail running monster.

» Horsepower Peak-to-peak:    
   Stock = 138.6 HP
   Banks = 201.4 HP
   Improvement = +62.8 HP (45.3%)

» Torque Peak-to-peak: 
   Stock = 176.0 lb-ft, 
   Banks = 249.4 lb-ft
   Improvement = +73.4 lb-ft (41.7%)

Jeep, Cherokee, Wrangler, Grand Cherokee, 4.0L kit Part # N48-137

VENOM VCN-1000 computer controlled nitrous oxide kits practically run themselves. All you have to do is set the nitrous flow by choosing one of the four nitrous nozzles supplied with the kit (25, 50, 75, or 100 additional horsepower). The kits are designed to cut off nitrous flow automatically if the air/fuel mixture becomes too lean. Plus, they adjust fuel flow through the injectors, so you don't have to modify the vehicle's fuel pressure. VENOM VCN-1000 computer controlled nitrous oxide kits are ideal for return-less fuel systems.

Kits include:

* Bottle and mounting brackets
* Control module
* Nitrous nozzles
* Wiring harness
* Solenoid
* Switch
* Hoses
* Rich/lean display
* Mounting hardware
* Installation manual

JEEP 4 & 6 CYL. EFI SYSTEM Part # 20920-10
(35-150hp)

SYSTEM CONTENTS

10lb. bottle with Pure-Flo valve
Lifetime guaranteed large solenoids
Hinged steel bottle brackets
14 foot stainless steel braided supply line
Heavy duty 40 amp anti-flyback relay
All necessary hardware

It's sold at Summit Racing under the part no. NEX-20920-10. DYNOmite chassis dyno tests show a 65hp/100lbft gain at the rear wheels (~76hp/117lbft flywheel) of a 4.0 TJ when using the maximum recommended (for internally stock engines) 75hp kit.