Frequently Asked Questions - Air and Fuel Systems
Instead of lengthening the gas filler as with most kits, you can raise the whole gas tank up. In the front, use two 2x2" spacers like in the kit and use 2" longer bolts. In the back, drill two new holes on the bracket and rebolt it.
Yes. Take a peek at "2 and 3-Inch Body Lift Airbox Modification."
As with performance exhausts, yes - absolutely. Increasing efficiency provides increased engine power regardless of engine type.
Purchase a K&N air filter cleaning kit from your favorite vendor. It is comprised of cleaning solution and spray-on oil. Follow the directions on the box - basically, soak the filter with water/solution mix, rinse and allow to dry naturally. Then apply the spray-on oil lightly and evenly until cotton gauze is red in color on both sides. Reinstall.
Never force dry the filter using compressed air, heat, etc. Also, never brush the filter in an attempt to clean it. This will damage the cotton gauze. You shouldn't need to clean the filter until you can no longer see light shining through the cotton gauze when held up against the sun or a bright light.
Stock paper filters should never be cleaned or re-used. Replace with a new unit.
Check your gas tank sender and/or fuel pump. After some amount of time/mileage, they have a history of failing possibly due to corrosion on the wiring. You can access the sender from underneath the back seat (giving you access to the top of the fuel tank). The fuel pump should be heard running for two seconds when the ignition key is first turned to the "on" position.
Check out this article for more information.
The non-supercharged Xterra uses 87 octane fuel whereas the supercharged models require 93 octane fuel.
No - it's pure snake oil. Save your money.
The direct air cleaner replacement from K&N comes with open-cell foam strips, which are NOT needed in the Xterra application. This cleaner fits multiple vehicles, and is for use on those.
The fuel filter only needs to be changed when symptoms indicate that a replacement is necessary, but folks have found varying amounts of debris as early as 20k miles. Your mileage may vary, and every 50k miles wouldn't be a bad schedule.
