For Stock racing and in particular ETS Classes such as the 40+ Masters and 21.5 Stock we have this stock specific spur . . - CNC Machined for the ultimate accuracy. - Manufactured to be light weight but using an extremely rigid material for stiffness and concentricity. - Secured with 3 countersunk screws for equal fixing pressure and accuracy. - 3.5mm width for the ultimate efficiency and weight saving. - Narrow design for improved battery placement and therefore left to right weight distribution. - Fits Mi8 / Mi9 / FT9 and many modern touring cars.