I was looking for a specific sized filter for a custom intake but the ones on ebay were all too big with a 6" outer diameter. I decided to give this one a try because according to Vibrant, this filter's outer diameter is only 5". What showed up was identical to the $14 ebay filters, it measured 6" wide and didn't fit! It was a complete waste of my time since now I have to order a K&N that has been properly measured (tried and true filters are worth the extra price). If this 6" wide filter will work for you, then get the same generic one for half the price on ebay.