Predator Pro ™ Slip-on Exhaust Mufflers Triumph Thruxton 900 04 - 15. These cool mufflers provide a great sound, and there is also a noticeable increase in power. A revolutionary one-piece design made from 304 Stainless Steel, which ensures quality and durability. Fasteners with rubber so that the vibration of the engine is limited, this ensures that the exhaust is properly secured. Sold in pairs. Made in the USA.