Here is the stock airbox (left)...
Here is the stock airbox (left) and the airbox from S&B (right). It's easy to see why S&B claims its airbox flows 40.2 percent better than the stock Dodge airbox.
The cold-air-intake kit was relatively easy to install and took about 30 minutes from start to finish. The instructions were helpful, and we didn't have to hunt for parts that weren't included in the kit. S&B also offers custom engravings for the top of its airboxes (as long as they're tasteful), so we had to get one that said Diesel Power, of course.
After the installation was complete, there were some notable differences in driveability. Throttle response seemed to increase slightly, and a healthy turbo whistle made its presence known-from spooling up until full boost. Having an intake tube that can be drilled and tapped easily is also helpful if propane, water/methanol, or nitrous will be added later. So follow along as we increase our airflow capacity by 40 percent with a cold-air intake from S&B Filters.
 This is the stock air silencer....  This is the stock air silencer. In addition to being restrictive, it also makes it almost impossible to hear any turbo noise. From now on, the silencer will do absolutely nothing, so you can remove it. Notice the studs coming up from the stock airbox-the new S&B airbox will use the same mounts, but it comes with locknuts. |  The S&B airbox is bolted in...  The S&B airbox is bolted in place. In this step, the locknuts will be there for good because the studs will start turning once things get snug. When that happens, it will be very difficult to loosen things back up. The studs will turn in both directions, so make sure you didn't forget anything (like rubber isolators). |  The stock hose to the turbo...  The stock hose to the turbo is then disconnected. This simply involves loosening a clamp. Make sure you don't get any dirt or debris in the turbo during this step. Also, now might be a good time to reach in and wiggle the turbocharger's shaft to see how worn it is. A little movement is OK-a lot might mean it's time for a new turbo. If you have a low-mileage vehicle, you probably don't need to worry about this. |
 Next, an inlet tube will need...  Next, an inlet tube will need to be installed on the turbo for the new intake tube to seal correctly. |  After finishing with the intake...  After finishing with the intake tube, drop the S&B air filter into the airbox. |  With all the clamps loosened,...  With all the clamps loosened, put the long air-intake tube into the airbox and connect it to the intake tube on the turbo. Tighten down all the clamps firmly, but don't overtighten. Once you're finished, wiggle everything around to make sure it isn't going anywhere. |
 Only one more step to go-putting...  Only one more step to go-putting on the airbox lid. |  The lid has little rubber...  The lid has little rubber and metal grommets that go on top (metal side up). They're a tight fit, so instead of trying to align them and put the screws in, put the screws through first, then tighten everything down. |  Here's the finished product,...  Here's the finished product, complete with a Diesel Power engraving. |