Bueno, existe un kit para el 4.0:
"Nitrous Express nitrous oxide kit
JEEP 4 & 6 CYL. EFI SYSTEM Part # 20211/20921
( 50-75hp )
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
DYNOmite chassis dyno tests show a 65hp/100lbft gain at the rear wheels (~76hp/117lbft flywheel) of a 4.0 TJ"