pcmforless is tunning my computer. finally going to install mid lenght headers - 1.6 gm rr's - lt4 springs. what should i do in regard to shift firmness - rev limiter and vehicle anti theft VATS ? should i leave them alone or remove vats - raise rev limiter (auto a4) and firm up the shifts???
all info very much appreciated.
ed in texas
all info very much appreciated.
ed in texas

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