Velocity Stack Stage 1 for buggies, karts, Air filter set. Increases air flow faster throttle response. Works on buggy carbs from 28mm to 36mm CAN BE USED ON SCOOTERS WORKS ON 30mm CARBS - WORKS ON 800cc BUGGY GOKA ROKETA JCL BMS 800c GOKART SAND BUGGY - Might have to sit there if no bracket but adaptable to all 250cc 400cc 600cc Buggies. SOME 800cc HAVE 30mm CARB WILL WORK ON IT.