Harrop Airbox Infill Panel Suitable for all VE Holden Commodore & HSV. When fitting any OTR you obviously have to remove the factory airbox, however this does leave a rather nasty hole in the engine bay. Besides looking less than factory, it also leaves a big area open in your engine bay above your passenger side front wheel which exposes the bay to rocks and debris that can damage various components, not to mention the aesthetics. Harrop Engineering have solved this issue by manufacturing an OE style Infill Panel constructed from a durable high temperature ABS polymer. Easy to install with simple handtools in 10 minutes you can finish off the look of your engine bay. If you have an OTR intake system fitted to your pride and joy, put the finishing touch on with the OTR Infill Panel. Also available are the Harrop Engineering side Facia Panel kit designed to suit the Harrop OTR intake (see our other listing). Harrop Airbox Infill Panel suitable for all VE Holden Commodore & HSV. Compatible with all brands of OTR intake, including Harrop.