RCM GRP Bonnet Vent Rear Facing 2003 - 2006 GD 14820-P30-010 Select the spark plug which

Select the spark plug which heat range is appropriate to the vehicle specifications

Club motorsport

and attempting to source or make the proper shims

Bigger diameter to increase the exhaust flow rate

Fits into the existing position and plugs into the existing wiring loom

RCM GRP Bonnet Vent Rear Facing 2003 - 2006 GD 14820-P30-010 Select the spark plug whichThe RCM Reverse bonnet vent is a great addition for any Impreza that has been modified to include a front mounted intercooler. Removal of the standard bonnet scoop removes unnecessary drag, and then turns this part of the bonnet into a really effective exhaust for un wanted hot under bonnet air. Not only is it really effective, but it looks great too!