The Titan is a stainless steel system built to withstand extreme temperatures, increase torque and horse power, add durability and improve the overall exhaust tone. This is the system you‚ ve been searching for. This is the Titan. 5" Stainless Steel: Virtually the entire exhaust system is built from 304 Stainless Steel. It doesn't readily corrode, rust or stain and it can reliably withstand the extreme temperatures generated from high performance offroad vehicles. The Louder XL: For the riders out there craving maximum horse power with maximum volume, the Titan-XL features an unrestricted internal core design that produces maximum horse power at an incredibly loud volume. Double Exhaust: These exhaust shells are big, and so is the performance they create. The 5" inch diameter exhaust shells house an internal exhaust core that creates maximum airflow. When stacked into a dual system, it creates even more power and performance while improving sound.