From what i understand you AEM
owners dont need that bypass valve and you Injen
owners dont need that splash guard... both are good for nothing paper weights...
In the event that it rains and you're on the road, the only way your engine will be in danger would be if your filter was COMPLETELY
submerged in water. A splash on the filter while the motor won't hurt. Someone said a while ago that there was a video of a guy with a hose squirting his filter while the car was running and nothing happened.
If you have to drive through puddles, do one of 2 things. Number 1 put your transmission in neutral and go as slow as you can through the puddle if traffic permits. Number 2, put your car in neutral and just drive through at the normal traffic flowing speed.
The reason why you're supposed to put it in neutral is because at neutral, your RPMs are at the lowest point, and when your RPMs are at the lowest point, the engine requires very little air to operate. In your Intake
tube is a vacuum when your engine is on and that vacuum isn't strong enough to suck up enough water at idle to kill the engine.