Used by championship riders throughout the world, the Pro Circuit RC-4 head pipe features resonance chamber technology to create a quieter pipe without compromising performance, thus allowing many Pro Circuit exhaust systems to meet both AMA and FIM sound requirements.  Follow along with this Product Spotlight as the additional features and benefits of the RC-4 Head Pipe are highlighted.
 

Click the link to view the video

http://www.youtube.com/procircuitinc#p/a/u/0/z2WxICv93qc

 
About Pro Circuit
Based in Corona, Calif., Pro Circuit Inc. is a leader in off-road motorcycle and ATV exhausts and aftermarket performance parts. Started in 1978, Pro Circuit is the go to shop for recreational riders and professionals for everything from suspension work to complete engine packages, and everything in between.
 
Created by former desert racer Mitch Payton, Pro Circuit proves its products and services week-in and week-out through its tagline “We Race.” Every product that dons the Pro Circuit stamp stems from the legendary Pro Circuit race team. A staple in the professional paddock, Pro Circuit Racing has earned 26 AMA championships and more than 200 race wins in more than 30 years of competition.