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400h Better Performance

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I think it is still a bit new for anything like that. I did notice that there is a cold air path through the front hood, directly at the air filter. That design extracts at least a 5+ HP over a non CAI (Cold Air Intake) design. I like it!


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  • 1 year later...

well here is another thing you guys can try... take apart the air filter box, there is a first air filter, which seems to be highly restrictive, and remove the piece, there is a second air filter, which seems to be more than sufficient. I also saw a K&N Replacement air filter for the "second" air filter in our vehicles on ebay, for around $50. I'm going to try driving around without the first stage air filter and see how much louder it makes the rx. I will let everyone know of my findings, as im prepared to order the K&N if its not too noisy.


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