Jenvey Blank 50DP Carbon Airbox BackplateJenvey Dynamics 50 mm Deep Carbon Fibre Blank Airbox Back Plate which you can cut to you own specifications. Suitable for use with a Jenvey filter or airbox. This Airbox Backplate creates more room for Fuel Rail and Throttle Linkages. This also can use a slimmer Air Filter. With this Airbox using 90 mm Air Horns we use a 90 mm Deep Filter which in most applications is much easier removed and fitted when in place. Specifications Depth 50 mm Volume 1.