Genuine Boyesen Products Manufactured with Boyesen’s exclusive Dura-Flex material. The top reed opens at lower RPMs allowing for more air and fuel flow giving you better throttle response. The bottom reed opens at higher RPMs for maximum flow.
Boyesen reeds need no reviews
Cheapest bolt on power since the 1970s sometimes the cheaper original option of boyesen is as good as the Rad Valve option can't go wrong either way