Get the Direct-Fit Hoses & Clamps products you need for the intercooler system on your 2003-2004 Dodge 5.9L Cummins. Aftermarket boot kits are often made with a durable silicone construction for increased durabiltiy and an extended service life. A direct-fit hose and clamp kit generally refers to a replacement component or set that is specially made to fit under your hood just like the factory component it's replacing. The factory boots in your intercooler and intake system are often made of inferior materials that degrade over time due to heat, oil, and other underhood conditions. A torn boot or failed clamp can cause boost leaks that can rob you of power. You’ll find high-quality manufacturers like AFE, BD-Power, and Mishimoto.