Dude I dont see how you ever hit a mid 12 with the stock injectors anyway. My stockers are choking my combo hard and its not near as extreme as yours. You dont need an off the shelf chip. Take it to a shop that does custom dyno chip burning. It will help a lot but its gonna cost around 6 bills with dyno time.
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95GT B303 cam, 1.7 rockers, 65mm TB, 73mm MAF, milled heads, 355's K&N, BBK Longtubes, Flowmaster cat back, pulleys, msd coil, 9mm wires, Tremec 3550, Pro5.0 shifter,10.5 Motorsport clutch, FMS aluminum driveshaft, weld in subframe connectors
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