Completely reworked system specially for the 300 + 301rr.
28mm diameter right the way through from the header to through the silencer.
Complete with carbon fibre rear silencer cover also. 
Amazing saving on weight and sounds sweet.
OUT OF STOCK ! WAITING FOR MORE TO BE MANUFACTURED IN JAPAN DUE TO COVID-19.- UPDATE 20/10.21. WE HAVE JUST BEEN TOLD THAT, STILL NOTHING WILL COME UNTIL SPRING 2022.