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  1. Blowoff Valve or By pass Valve ?

    Engine and Technical Discussion
    I have a 2018 Elantra sport and finally making some mods on it, I just recently did a resenator and muffler delete, and now I'm looking to get either a blowoff valve or By pass valve, Which one would work better for the car? And would I need an after market Intake for it ?
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