There are a lot of vehicles out there that that have custom engine swaps, modified frames and bodies, or are just too old to have a readily-available bolt-in air intake system for it. If you fall into one of these categeories, then you've either accepted that you'll be running a 14-inch chrome filter element forever, or you'll be spending big bucks to have something custom made.
Well, Airaid has come to your aid and is now offering its U-Build-It (UBI) kit, containing all the parts you need to design and build a custom air intake for your vehicle. There are several variations of the UBI kit for every engine from mild to wild. The Master Kit I flows up to 1300 cfm while the Master Kit II is manufactured for heavily modified engines and is capable of 1700 cfm. Both kits use a 3-, 3.5-, or 4-inch diameter, cross-linked polyethylene intake tube. The major difference between the two kits is the air filter. The Master Kit I draws air in through the 4-inch inlet of a 6-inch or 9-inch long Airaid air filter. The Master Kit II achieves its high flow by using an adapter to connect a 6-inch inlet, 9-inch long filter onto the intake tubing. The polyethylene tube comes in a single piece with various length and bends to let the fabricator (you) decide exactly how to route the air intake for that particular vehicle. The Airaid UBI kit is well designed from solid materials, offering a variety of options from a single package.
Whether your rig is bone stock or is built to the hilt, there is an Airaid U-Build-It air intake kit that will give you a performance package with a custom look.
 Shown here is the Airaid UBI,...  Shown here is the Airaid UBI, Master Kit II. It has all tubing, couplers, clamps, the adapter for the 6-inch inlet air filter, and hardware that you should need along with an Airaid Premium Filter. We also ordered the optional intake hat (Airaid has two versions) to sit on top of the throttle body. |  Before you start cutting into...  Before you start cutting into your new UBI kit, it's a good idea to lay things out under the hood. |  Once we had a plan, we took...  Once we had a plan, we took some rough measurements and went to work with a Sawzall...... |
 .....We just cleaned up the...  .....We just cleaned up the cuts with a razorblade to ensure everything fit together smoothly. |  It's amazing what you can...  It's amazing what you can get done with a half-hour and a well manufactured kit. While this kit will allow enough airflow to route the intake tubing any way we wanted, we were able to use a single piece of intake tubing for a clean look and smooth flow. |  Using the supplied parts,...  Using the supplied parts, we mounted up these brackets to keep things from moving around. We also used the flex coupling here to isolate the filter from engine flex and vibration. |
 Before/After We think it turned...  Before/After
We think it turned out pretty well! We have a way better air intake on this truck than we did before, and it wasn't much harder than bolting some..... |  ......pre-fabbed kit onto...  ......pre-fabbed kit onto the engine (if anyone made a kit for a Bronco II with a Classic Bronco frame and a fuel injected V-8 engine...). | |