I prefere to have all my stock things in original condition, so i bought one with my K&N filter.. you can find packages with both on ebay...
I gained 2 bhp with the open box, in the entire spectre... (had it rolled with and without on the same dyno)
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2002 750ss, pcIII custom map, carbon termi pipes, k&n w. open filter box, lighter flywheel, clearalt rear light, with both black and yellow tanks and ff. Alu Swingarm.
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