There is not much more important for the health and efficiency of your Jeep engine then the air it breaths and the fuel it consumes. If your Jeep engine is sucking in dirty filthy air or the dirt and dust clog your air filter reducing the airflow you are missing out on vital horse power and killing your fuel economy. The first thing you should do on a vehicle is get a top of the line Air Intake and Filter. This will pay you back many times over.

Fuel Deliver is also important. Stock Jeep fuel delivery must be maintained and upgraded where necessary. Face it, we all know we like to change our Jeeps and one item that slips our minds sometimes is the all important Jeep fuel delivery system. It doesn't matter what you drive, if you are in the middle of nowhere and you're fuel delivery is cut due to clogged, unserviced fuel pump... good luck.

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AIR CLEANER FITS 11 16 COMPASS 136459
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Standard T Series AC176T Idle Air Control Motor
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INJECTION PARTS FUEL INJECTOR SEDAN 24L FEDERAL FITS 14 16 CHEROKEE 79424
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Mopar Fuel Injector Set  4891577AC NEW X 4
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FUEL PUMP JEEP GRAND CHEROKEE 05 06 07 08 09 10
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Products listed above will help with gas millage, fuel efficiency, clean air, engine longevity, etc... Start with an good quality air cleaner, then move to an air intake kit that was engineered for your vehicle and takes into consideration proper air flow and restrictions. Once you have the air taken care of, move to your fuel system. You can go as small as replacing your gas filter with a new high efficiency gas filter. There are lots of people that replace their stock Jeep fuel sending units with external ones or put an external inline with the stock Jeep fuel pump for redundancy and increased fuel pump life.