Modifications I’ve made to my ’98 Grand Cherokee 5.9 Limited:
By: Scott Mueller

Performance Mods:

-Mopar Performance PCM p/n P4876898 (’98 Federal Emissions)
-Extrude Honed/Jet Hot coated exhaust manifolds
-Jet Hot coated Y-pipe
-Jet Hot coated “off-road” (cat delete) pipe
-Casper’s downstream O2 sensor simulator
-180 degree thermostat
-DexCool long life coolant
-25% under drive steel crank pulley, shorter belt
-Fastman 50mm ported factory throttle body
-Don-a-Vee 5/8″ throttle body inlet spacer, Jet Hot coated
-K&N air filter w/drilled lower air box
-UpCountry suspension springs and jounce bumper spacers
-Addco front/rear swaybars (larger diameter than stock)
-Energy Suspension greasable swaybar bushings
-Air Lift bags in the rear springs (for level adjustment while towing)
-Sachs UpCountry shocks
-Synthetic fluids (engine, xfer case, trans, fr and rr diff)
-Factory auxiliary transmission cooler
-Power steering cooler (using factory 6cyl trans cooler)
-Aluminum finned front diff. cover (holds more fluid, better cooling)

Accessory/Appearance Mods:

-Factory export E-code headlamps (far superior to US headlamps)
-Narva 90/100w H4 headlight bulbs
-Painless Wiring headlight harness w/dual Bosch 40-amp relays
-Modified fog lights to operate with high beam headlights
-Dichroic (coated) 55w yellow H3 fog light bulbs
-Converted front turn signals to dual filament (running light) operation
-Brighter (higher output) tail, backup and side marker bulbs
-Tekonsha trailer brake controller (connected to factory trailer wiring)
-Polyurethane clear coated undercarriage (corrosion protection)
-Harada FM antenna preamp (pulls in more stations, better stereo)
-Painted 5.9 grille inserts semi gloss black
-Chrome front tow hooks (Reese) on factory brackets

Email me (address above) if you have any questions about any of thesemods. Scott.

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