Quote:
Originally Posted by Koopa Troopa
My friend's B16 EG6 actually gained 2.X WHP on unknown Oki dyno by removing the air filter....
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Gains from intake really depends on the car, how restrictive the stock intake is, and where the filter is mounted. For most cars, you will not notice that much gain from just an intake.
Also, on some cars you actually lose power with an aftermarket intake, e.g. Evo.
If you really want to dial in your car, you need a dyno and at least a piggyback if you don't want to reflash your stock ECU. Or you can go with a standalone.
Other than that, any intake should do provided it's mounted securely and the filter is clean.