Intake funnel -SIL-TECH PERFORMANCE- for Dellorto SI carburetors SI20/22//24 and 26 mm diameter Including fixing screws, which must be glued in with medium-strength threadlocker. The holes in the funnel prevent the screws from falling out in the direction of the intake port. Please note that the air correction of the standard air filter is omitted. The main air correction nozzle and/or the jetting in general must then be adjusted accordingly. Supplied with English/Italian installation instructions. Material : PA 12 ( Nylon/Polyamide) Color : black Fastening : 2 x M5 hexagon socket screw made of stainless steel