PVC piping is a no-no, when exposed to excessive heat, they release a gas that affects engine performance negatively. in my opinion, if rocking PVC piping is acceptable to you, then you really shouldnt be tinkering with your engine in the first place. PVC or not, if it was that simple to make power, honda would have done it already. stick with a k&n drop-in and you should be fine. yeah its 70 bucks or whatever, but dont waste your money on that cold air intake.

The extra 1-2hp, and 0-1 ft lbs doesnt even seem worthwhile. The same goes for exhausts. I've been there and done that with NA bolt-ons. I really wish I could go back in time and just saved my time and money elsewhere.