i actually had a ramflo one on my K series a while back.. was loud, sucked in hot air, btu it was better than the stock restrictive air cleaner.... i can't remember what model it was, but my brother also bought one from supercheap or similar, so they must be available still... just measure the size the hole needs to be, then cruise down to supercraps etc and see if there is one there that fits... about $40?
i dunno about quality.. it's a pretty crappy foam filter that will stop[ rocks but thats about it.. then again.. it's only a K motor
Redline should do one that fits (rectangular.. 6x9"?? or similar) also..
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