Fits beautifully in the stock air box. Simply take the top of (remove the two t-25's) and replace with the K&N. Better sound, better mileage, overall just better.

 

I have one in my SC300.

They work great

 

Only thing I dont like about them is the fact that it has to be oiled.. I just wish they would design a good dry filter...

Hence the reason I'm going to build a custom intake for the volvo.. just to get a nice low restrction, dry filter on there , AEM maybe

 

I have the same K&N also and love it, I could not find a good deal on ebay so I found a discount coupon here: K&N RE-0920, or you can try one of the vendors on the forum here, you can usually find a good deal that way as well. This was very easy to install and I love it.