Larrys Electric - Universal Tuned Port Injection harness Tuned Port Injection stand alone EFI wiring harness . This harness takes care of the headaches involved with installing Tuned port injection on most all SBC engines or swapping a TPI engine into your vehicle, and makes for a much easier installation. Our harnesses are all made with top of the line copper strand wire. GM TPI Wiring-Ron Francis Wiring GM TPI WIRING Mass Air Flow harness for modified GM Tuned Port Camaro/Firebird/Corvette 5.0, 5.7 Engines (1985-1992): Excellent choice if your engine has been modified with a larger cam or higher compression and you are concerned about vacuum.
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