Custom Cold Air Intake Options

[dexterity]

Just a couple of questions, I was on the "how to" section of 6gc and I'm interested in making my own cold air intake.
I was just wondering the difference in a self made one, and one made from Injen or Dr.Cai

difference in Performance, Quality, Sound?

if the differences are Signifigant then I might just buy one, but if there isn't THAT much of a difference I think it would be pretty fun to make my own, cheap and something to be proud of.

one more question, what's a bypass valve and where in the intake would it go?

[stspiffy]

self made intakes are intakes made by yourself. the injen intake is produced by a bigwig company, and the dr cai is john dolecek's dolecek racing cold air intake that he manufactures himself. definitely a good investment.

the bypass valve decreases the chance of water getting sucked up into your engine via the air intake. it goes along the inlet piping and if the pressure drops within the pipe it stops air from coming in through the filter and comes in through the valve instead.