You will defintiely get enough air using a PRM filter. Look around the site and you'll see an Probe on there. It's owned by Jerry, the owner of PRM, and I think it is still the most powerful NA KL-03 engine out there. Needless to say he has done some headwork adn other stuff, but it does go to show that the PRM flows some serious air.
K&N Filter will not give you a noticable advantage over your airbox.
When I got my PRM installed I talked to the owner and he feels that its useless to just put a K&N Filter on. You are still pulling hot air from the engine bay.. instead of the cold air which you would get through a CAI.
it still will suck in alot of hot air, especially when the fan kicks in and starts blowing all of that hot air right on your filter. The PRM helps prevent this by completely covering the filter rather than a heat sheald that only covers a portion of it.
Yes... but you have to realize that you would need to run into a puddle that is over 2 feet deep, unlike a hotshot which can suck in water from a puddle which is less than 1 foot deep since the filter rests so close to the ground.
Don't get me wrong though, the hotshot should probably make 1-2whp more than a un-modified PRM once the car is moving, but you can attach a pipe extending the prm pipe and turn it into what I like to call "PRaM" since you get a ram-air effect and that should make more power.
Also the PRM filters last A LOT longer between cleanings since they are not exposed need the ground.
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