Quote Originally Posted by NightKids View Post
Sorry I think I would have to object, don't skimp on crappy eBay intakes. Companies like AEM and Injen have spent a lot of money on research for maximum air flow. Even if the price to kw ratio isn't the best I have no doubt it'll definately perform better.

I've personally used an AEM one and it's great. The material they use is heaps better as well, nice and sturdy. The eBay piping I used feels really hollow and flimsy...

What are your experiences with ebay intakes?

How will the difference in piping material/thickness alter performance? I don't understand how much R&D needs to go into a piece of intake pipe - 1 degree or extra or less angle in the bend?
I think the difference of internal friction or whatever would have a minimal effect as most pipe is normally sufficiently smooth.
Thickness only affects strength IMO. If the piping is thicker it will take longer for it to absorb heat, but also take longer for it to cool down, and the amount of time the air spends in the piping is negligible with regards to that.

Air filters for sure I would recommend using a good one but for pipe I see no difference at all. I would even like to get somebody to volunteer their Injen intake or whatever, then use my DIY intake with the Injen filter (on a dyno) to see if there's any change in output.