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What mods make the hyundai a little more reliable and run better? i run cheap gas and looking for spark plugs heat range 9 because i’m FBO no tune

1147 Views 7 Replies 4 Participants Last post by  trdtoy
I’m in the market for some helpful items, i seen everyone with catch cans but are they even all that?
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I have a downpipe CAI MBRP exhaust and a tune I use 91 but would I have to get a flash tune or dyno tune to use 93 or will my car work with 93 with what it has?
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