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Most people, including myself, feel the popcharger is a good intake for the money. It adds a nice sound, it's in the engine bay so it stays fairly clean plus it's easy to clean, and it may even gain the 6hp it claims to. The cold air system places the filter in the wheel well. They need to be cleaned more often, the risk of sucking in water is much higher, and they supposedly don't gain as much power as the short ram intakes.
Read every post you can find about intakes then draw your own conclusions. Or just buy the popcharger and get it over with. You can find them for @110.00 bucks from a few sponsors on this forum.
roger that.. i purchased a popcharger/heatshield from Performance Nissan and its been good to me.. love the sound of it, easy to clean... and its pretty good for that price.. pretty damn good too~
popcharger all the way. alberto explained it once after he got another 10whp or so over his injen cai with his popcharger. something about sucking out of a straw, shorter the straw the less work you have to do.