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Thunder Innovation releases their Pro-One 4 shoe clutch.  This 4 shoe clutch system is produced with very high quality CNC aluminum materials and includes 4 high grade clutch shoes, medium weighted 34mm flywheel, 3 clutch spring options ranging from .9mm to 1.1mm in diameter, engine collet and clutch nut.  This 4 shoe clutch system offers a much smoother power band and allows for much more control of the vehicle without sacrificing any bottom end.    
Thunder Innovations is exclusively distributed by VP Pro USA in the USA.  Dealer inquiries are welcome.