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  • Hemmings Muscle Machines

    SWAP MEET

    Feb 27, 2021 3 minutes
    By Jim O’Clair

    ODD TUNED-PORT INJECTION UNIT DISCOVERED

    :I have a 1989 Pontiac Firebird with a Chevrolet V-8 Tuned-Port Injection system on it. I found and purchased another TPI system at a swap meet; however, this one appears to be an aftermarket unit and has no identifying marks on it other than IRS. It is also a larger assembly than the one I have currently installed on my Firebird. My research into this unit came up empty. Could you get me any information

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