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Highflow kit experience
I installed my EVO Highflow over two years ago and have had no MAF issues.
Recently checked out the intake side and reinstalled just to ensure there were no leaks and everything looked fine.
Overall in car experience is more flow at higher rpm leading to a 'surge' in acceleration, whereas the stock intake provides smooth acceleration which tapers off at high rpm. So you certainly feel as if there is more 'kick in the pants' than stock. Of course the sound is incredible and every Boxster owner that has ridden in my car wants that sound. Good thing is it is not like an exhaust noise which attracts cops, this is more an in cockpit experience.
Problem is your gas consumption does rise, but my feeling is that is more due to the urge to use more throttle for the noise, hence more gas.
Install is hard work. First removing the 'snorkel' is tough because you have to tug pretty hard on that nice car to get the thing out. Then the airbox, which requires removal of the intake manifold or destroying the air box - your choice.
Not for the timid...
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