99-14 TRX 400EX/X mod assembled to OEM lid

This option is for those who don't want to go with the DIY route.

A simple modification to the OEM airbox lid to increase the airflow similar to having no lid at all, while providing added protection to the air filter.  I use outerwears water repelling mesh and a rubber gasket for prefilter protection and sealing to the lid . They are 3d printed from quality ASA plastic to hold up to the harsh environment of the offroad world.  A brand new OEM lid will be used to make your modded lid.

****Proper jetting will be required for any modification to the air/fuel system****