mitsubishi galant EA2A
 

Hi i have a 2002 mitsubishi galant with a SOHC 2.0L 4g63 engine . (i think ) :P . :)
ive been having this car for sometime and has always wondered what this thing with a R and L marked on it near the Airfow sensor is supposed to do . (picture attached below) . would be great if some one could shed some light on what it is thanks :D

the thing is marked with a red arrow :D

http://s16.postimg.org/tihjefef9/141...16817720_n.jpg

http://s7.postimg.org/nkvsx8vfv/1474...50162983_n.jpg