1995 3000GT: K&N Filter Installation

• Why Do I Want To Do This?

  • Replacing your stock air filter with a clean filter when it gets dirty helps keep your engine operating in optimal condition.
  • The stock filter is fairly restrictive as it is inexpensive (as filters go) to manufacture, leans toward increased filtration rather than maximum airflow, and along with the airbox, is designed to reduce intake noise.
  • By replacing your stock air filter and airbox with an open-element air filter like the K&N FIPK, you can increase the airflow into your engine, possibly generating more power.
  • K&N claims to filter the intake air at least as well as the stock paper filter, if not better.
  • The K&N filter is reusable and thus can be cleaned and re-oiled rather than thrown away and replaced when it becomes dirty.




• How Often Should I Do This?

  • Only once. Strap the filter on and drive. When the filter gets dirty, remove it, clean it, re-oil it, and reinstall it. It's that simple; no more buying air filters every 15,000 miles.




• How Long Will It Take Me To Do This?

  • If everything goes smoothly, you could be done in 30 minutes. However, the 4 bolts that attach the MAS housing to the airbox are notorious for stripping the plastic anchors holding them on the other side. If this happens to you, then you will probably need an hour or two unless you just give up early and rip apart your stock airbox.




• Anything I Should Do Prior To Attempting This Procedure?

  • Get the parts and tools you'll need.




• What Mitsubishi Parts Will I Need?

  • None.




• What Other Parts Will I Need?

  • (1) K&N Fuel Injection Performance Kit (FIPK 57-100-1)




• Where Can I Get the Stuff To Do This?

  	Part	Company/Contact	Part Number
  	Part	Dynamic Racing	57-100-1





• What Tools May/Will I Need?

  • (1) 5/16" 3/8" Drive Socket
  • (1) 10mm 3/8" Drive Socket
  • (1) 10mm open/closed end wrench
  • (1) 3/8" Drive Socket Wrench
  • (1) 5mm (or 3/16") Allen (Hex) Wrench
  • (1) Pliers, Robo-Grips, or something similar (optional)

The Procedure

	Loosen Hose Clamp and Disconnect the MAS Harness
	Loosen the hose clamp on the lower portion of the intake as labeled in the picture. Also unplug the Mass Airflow Sensor (MAS) electrical connector and move it out of the way.
	Remove Airbox Lid Clips
	At each of the four corners of the airbox is a clip that attaches the airbox lid to the airbox. Pop these clips off so the airbox lid can be removed.
	Remove Airbox Lid and MAS Housing
	Now you should be able to remove the airbox lid completely from the engine bay. Note that the MAS housing will be attached to the airbox lid at this point. Also, remove the 3 10mm bolts/nuts that secure the airbox bottom to the chassis. Then remove the airbox bottom.
	Unbolt the MAS Housing From the Airbox Lid
	Update: If you use an impact wrench (or simulate one by placing a socket wrench on the nuts and tapping the wrench with a fist or hammer) rather than gradually increasing pressure on the nut to break it loose, the nuts seem to pop off without damaging the airbox lid! Try this as it even worked on a 10 year old 3000GT that had never had the stock airbox lid removed. It will save you a lot of frustration. This is where all the fun begins (unless you're lucky). Each of the 4 bolts in the picture have a 10mm nut on the other side. Usually this nut is stuck on the bolt extremely tightly. This means that as you turn the nut on the other side, it will deform the plastic on the side in the picture such that the bolt head will simply spin as you turn the nut. If this happens, you have 2 options: 1) find something that will hold the bolt head still while you remove the nut or 2) destroy your airbox lid and resolve to not care about ever putting it back on.
	Separate the MAS Housing
	The MAS Housing will now separate easily from the airbox lid. This would be a good time to straighten any of the "honeycombs" you bent when the pliers you were using to hold the bolt heads slipped and gouged the honeycombs. A needle-nose pliers works well.
	Attach the Filter Adapter
	The FIPK comes with a metal adapter that attaches to the MAS housing and allows the FIPK filter to clamp to it. Use the supplied allen screws (3/16") and nuts to attach the adapter to the MAS housing. Note that the "L" brackets that come with the FIPK should be attached to the lower two screws on the MAS housing and then attached to the stock airbox mounting locations to secure the filter assembly.
	Install the New Filter
	Slide the filter over the adapter and tighten the hose clamp (5/16") securely. Also tighten the hose clamp on the other side of the MAS housing (10mm). Finally, don't forget to reconnect the MAS electrical harness, or your car will not idle properly and will run extremely rich.