Why use cast aluminum? S&B chose to manufacture our Intake Elbows out of cast aluminum because you need a part that delivers extreme performance without the risk of it bursting in the field. While we too liked the idea of using a composite material to make our elbows, trust us, it’s not worth the risk. Streamline the airflow after the intercooler. The smooth design of the S&B Intake Elbow significantly improves the airflow after the intercooler. The result is denser air delivering more power and better fuel economy. Still want even more out of your diesel? S&B's Intake Elbows include 1/8" NPT ports for simple gauge and power adder installation. Built with Precision Machines We tap all the ports on our CNC machines, so you can be assured of a perfect fitment without scraping your knuckles. O-Ring seal provides for leak-free operation. If it leaks, you lose power. Whenever possible, S&B utilizes an o-ring to seal the elbow and provided worry free operation for the long haul. While many of our competitors insert bolts through the air chamber to secure their elbow, S&B kept it clear to provide you with the best possible airflow