[Crazirich]

Puppet is right... they call that thing the filter minder.... its how you tell your "long life" air filter is plugged.... too bad they are crappy little things... i've seen a diesel blow these things to bits... and they also come apart on thier own.. i guess the spring inside is too strong for it... i press mine all the time to make sure it works... if the filter is plugged you'll see the little thing inside move inward to the red area....

anyways the hydrocarbon trap (HP trap :lol: ) REMOVED is good for a couple horse according to the tests that the magazine has done... (focus fanatic)...I'll see if i can find an article..