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Stock air filter is the best lasting power. Once aftermarket filters get dirty they flow less than the stocker. You may get a power increase from a aftermarket filter but that will fall off quikly. That info is from a super reliable source on this forum. As for evo or anything like that.... Im sure their less restrictive, but they will up you intake air temps rediculously. Stock is definatly the best long lasting tested method to go with. Just my two cents.
J
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996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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