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General Car Related Discussion.To discuss anything that is related to cars and automotive technology that doesnt naturally fit into another forum catagory.
K&N dont list them as they made them as a special order according to the guy I delt with at K&N so were never intended for general sale. K&N also supplied the filters to GGR for their dump valve, which is the one I bought (my valve pictured below with GGR filter fitted) from GGR:
I was right with £16 then The only bit I found size wise was they're minutely shorter so they're not as a secure fit once the base plate is screwed back on, not a problem though tbh.