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Welcome to Harris Performance, the home of TBI CHIPS throttle body injection services. Many still out there with TBI vehicles needing help getting more modern power levels and fuel mileage from older GM throttle body injected vehicles without going to the process of rewiring the vehicle to run a more modern fuel injection system. While TBI has a few crippling limitations it is still possible to pull a little over 1hp per cubic inch from these vehicles but requires a LOT of good planning and implementation to pull that kind of power level off and I am here to help provide that advice as well as support for the computer system to help you get there.