K&N Performance Filters – Installing One In Your Mustang

Since adding K&N’s full line of intake products on our store – Click Here For Our Full Selection – we decided to give one of them a try on our 93 LX project car. We opted for a large filter unit that replaces the stock airbox and rubber piping. The install was very straight forward and took only a few hand tools. Install took no more than 45 minutes to complete.

K&N filters are special because of their high flow characteristics and their superior engine protection. By using an oiled element they are able to trap the most dirt and dust compared to a factory paper filter or a standard replacement filter. Not only do they flow and filter better, but they are completely re-usable and will last the life of your vehicle’s engine. By using K&N’s Filter Recharge Kit you can clean and re-oil your filter back to new. They recommend you clean your filter every 20,000 miles to ensure the best protection and performance. After several years and a hundred thousand miles, the K&N filters practically pay for themselves. You actually CAN save money while gaining performance, reliability & economy…who woulda thought? Now on to the install for foxbody Mustangs:
Tools Needed:

1/4″ Drill

12mm socket

11mm wrench

Flathead screwdriver

Start off by removing the two 12mm nuts that hold the factory airbox to the engine bay.

Next, remove the clamp below the MAF sensor using a flathead screwdriver.

Once the clamp is removed, pull the factory intake assembly out of the engine bay.

Once the airbox is removed, you will need to use your 1/4″ drill bit to slightly enlarge a hole for the K&N filter’s bracket mounting position.

Once the bracket bolt fits through the hole, fit the bracket in place and tighten it. You will have to reach under the bumper to tighten the nut from the bottom of the bolt.

Once the bracket is in place and is snug, it’s time to install the new filter. Get the filter in place and make sure the threads on the end of the filter fit inside the bracket. Tighten the 11mm nut on the end of the filter.

Next tighten the hose clamp at the filter opening to ensure there will be no air leakage.

That’s it! You’re done! Below are two photos comparing the factory intake and the new K&N filter.

How-To: Installing Headlamp Lenses & HIDs in 79-93 Foxbody Mustangs

With more and more cars on the road coming equipped with HID headlamps from the factory, older cars are really starting to show their age in terms of lighting technology. The foxbody Mustangs come standard with halogen bulbs and plastic housings that are prone to clouding over time, which is rather dangerous for night visibility. At StangMods we love lighting, so when we picked up our 93′ LX project car one of the first things we replaced were the headlamps. We opted for an OEM style 3-piece design. There are 1-piece lenses out there for the fox, but they don’t fit the same and look a bit tacky in our opinion. We wanted to keep the car looking as original as possible while improving light output and appearance. The image below shows the difference between the stock with halogen and the new lenses with our 4300k single-beam HID kit.

The install was rather simple, took about an hour and a half from start to finish. The most difficult part is removing the stock lenses, some of the nuts that hold the lenses in are hard to get to, but with patience and the right tools for the job it was well worth it. On each headlight, there are 7 nuts total. The image below with the lenses removes shows clearly where these mounting points are, circled in red. These nuts are 11mm, and we used both a socked and an open-end wrench, depending on the location.

These 7 nuts are located on the back of the headlights, the passenger side was a little easier to work on. On the drivers side there was one nut we had to access from the bottom through the front bumper, but again we stress that patience and an open-end 11mm wrench and socket will get the job done. We started with the passenger side corner lens, once you remove the two nuts holding the lens in place, rotate the bulb and free it from the lens.

The center lens, the actual headlight, has three 11mm nuts holding it in place. After removing these the lens slides out. Twist the bulb retaining ring and slide it back, the headlight bulb will come out easily. Make sure to keep this black locking ring, it is required and you will be re-using this on the new lens.

Next up remove the inner lens that houses the turn signal. We decided to replace the stock amber turn signal bulb with our 3157 chrome/amber bulbs. They look chrome when off but light up amber.

Back to the headlight lens, you will need to remove the three black clips holding the plastic bracket to the back of the headlight. These clips pop off and the bracket shown below will separate from the back of the stock housing. You will be using these three clips to fasten the stock bracket to the new lens, so be sure to keep these handy.

After removing the bracket, remove the rubber weather stripping shown below from the stock lens, as you will be using this on the new aftermarket lens. It is held on by clips on the side, it slides free easily.

Install the original headlight bracket onto the new lens and fasten it with the black metal clips. The rubber weather stripping also installs on the new lenses.

Install the new outer clear lens and side marker bulb.

After installing the new clear outer lens, find a safe and secure mounting place for the HID ballast behind the headlight, make sure none of the wires will be pinched. Feed the wires through the hole behind the headlight lens and connect the harness.

After the ballast is in place, install the HID bulb in the lens and feed the wiring through the locking ring. Install the locking ring and connect the bulb to the HID harness. Be sure to check power and make sure the HID bulb comes on before mounting the new headlamp lens to the car.

Last step is to reinstall the turn signal lens. After all the new lenses are installed, be sure to replace and tighten all 7 nuts behind the lights.

Repeat all the above steps on the other side. The install is simple, hardest part is getting the lenses out and locating the nuts holding the lenses in.

Below are some photos comparing the stock lenses to our aftermarket clear ones.