Graves Smog Block Off Plates Billet Aluminum Fits Yamaha YZF-R3

Description

The Graves Motorsports Smog Block Off Plate is designed to seal off the port on the valve cover used by the air injection system (a.k.a smog pumps or AIS). The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons. Once this is capped off the air injection system can be safely removed for use on the track. These Smog Block Off Plates are made from CNC’ed billet aluminum and feature the Graves Motorsports “G” logo.