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2010 Impreza 2.5i Hatchback Base

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  • 2010 Impreza 2.5i Hatchback Base

    So I have a 2010 Impreza 2.5i Hatchback Base (so non-turbo) and wanted to know what mods I can do. So far I need to change the tires and put a sound system in but mechanically, I was thinking some coilovers and a catback, maybe a cold air intake. Would those hurt the engine or help improve flow and increase power?
    Also, it's a 2010 with about 185,000 KM on it. Is it worth it to use higher octane fuel with high-end spark plugs or is it pointless with this year and mileage?
    Thanks!
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  • #2
    I have a 2009 same body style and I have a borla catback on right now. Not obnoxiously loud but still sounds good when you get on it. With the cold air intake, short turn it would increase power but it will eventually lean out your car. If you wanted to do it, just make sure you throw your stock airbox back on occasionally. I haven
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