The Traxxas Resonator aluminum tuned pipe for Maxx trucks is specifically engineered to boost performance. It is the ultimate Maxx musclepipe! Traxxas Resonator aluminum tuned pipes are precision-engineered on the dyno to increase the power output of TRX® Racing Engines. The Resonator dual-chamber Maxx pipe (part #5487) provides an average peak torque increase of 16% resulting in brutal bottom end punch. A 10% increase in total power across the whole range provides smooth power delivery, perfect for the back yard or the race track. All Resonator pipes are fully polished to a beautiful mirror-chrome finish with a laser etched logo. Mounting hardware is included.