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K&N was a waste. It's no better than the factory intake. In fact, it allows hotter air in than the factory intake. Factory on premium gas is 365 HP, so to reach 400 all you need is a tuner.
K&N was a waste. It's no better than the factory intake. In fact, it allows hotter air in than the factory intake. Factory on premium gas is 365 HP, so to reach 400 all you need is a tuner.