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  1. Engine Performance
    Hola, So I drive a 2015 wrx with 30k miles and I have a K&N CAI, and a Rev9 Catless 3" downpipe and an aftermarket single exit 3" exhaust with a cobb stage 2+ tune for such mods... I also just went from 17" rims to 18" so i have taken into thought the idea of my speedometer being off and thats...
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