FOUR-STROKE EXHAUST When Yamaha first introduced the YZ400F way back in ‘98, the minds at Pro Circuit were already hard at work developing new technology and researching ways to create four-stroke horsepower. For 2016, we continue to push forward with new designs and cutting edge technology. Our exhaust systems are designed in-house and rigorously tested by our race team and support riders to make sure our customers have the very best performance exhaust available.
Intended for AMA/FIM/MA closedcourse racing only.
Ti-6 PRO TITANIUM EXHAUST SYSTEM The next generation of professional level race exhausts Ideal for series such as AMA/MA Supercross/Motocross Passes AMA/FIM/MA sound regulations Titanium throughout head pipe, mid pipe and muffler(s) Carbon fiber end-cap(s) Equipped with RC-4 Resonance Chamber (Select Models)
Machined aluminum muffler bracket(s) for durability Asymmetrical muffler configuration for a higher packing volume Machined mid pipe to head pipe joint for a better, leak-free fit TIG precision welding Made in the USA Not MA legal
Ti-6 TITANIUM EXHAUST SYSTEM Max performance while meeting AMA amateur noise requirements Ideal for closed course or off-road racing Titanium throughout head pipe, mid pipe and muffler(s) Carbon fiber end-cap(s) Equipped with RC-4 Resonance Chamber (on select models) Machined aluminum muffler bracket(s) for durability
Asymmetrical muffler configuration for higher packing volume Machined mid pipe to head pipe joint for a better, leak-free fit Removable USFS approved spark arrestor(s) TIG precision welding Made in the USA