I bought one of these filters from ebay. They sound great but are a nightmare to fit. I decided to buy some L shape brackets and screw them into the holes left by the original air filters pipe, that in essence draws the cold air from the front of the car. I then drilled some holes in the top of the filter. To stop the new filters case cracking i put masking tape around where i was drilling the holes. I then got some washers and most importantly some rubber washers and bolted the new filters casing onto the L shape brackets.
Making sure that the rubber washers were joining onto the filters casing not the steel washers.
Its worked for 1000 miles of bumpy country roads!!!