airfilter????
#2
In reality, just about every filter will deliver the same performance, unless it is very small. These little engines don't pull enough air to justify the need for a big, $20+, "performance" air cleaner. The stock one should be fine. If you don't like it, get the MotorSavers filter; around $15, has outer screen and replaceable element, and can get very dirty before it starts to effect the engine.
#3
In my experience, I've gotten to trust motor saver over other filters. That's all I'll use on my engines, I toss the stock ones that come with the engine.



