Anybody using K&N intake?

I am thinking about getting K&N intake. What's your opinion on it and what's the difference between K&N typhoon and the K&N Fuel Injection Performance Kits (FIPK)?

i have k&n. get a cheap ebay intake and then order a large k&n cone filter from an online vendor. Total will be around $70 (u can find free shipping on filter) and u will get the best intake possible.