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This always bugs me.
We have cold air induction on every Boxster from the factory. We take air into the engine from outside the hot engine compartment so the air is cooler/denser.
What you guys are talking about is a low-restriction air filter.
Of course with low restriction comes a downside, more and larger particles of dirt get into the engine. Seen two tests by independent test facilities.
Also I've had tuners with no axe to grind or $ to gain by selling me something tell me the stock air filter is just fine for about everything but a highly enlarged/modified/tracked motor.
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