definitely have to have a complete wire harness. There is a guy on S197 forums that put a 5.0 in an earlier model S197 a few years ago and a good bit of stuff that had to be done even in that car. Of course once he got it tuned he made around 440 to the tires and went high 10's in the 1/4 
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2009 Porsche Carrera S
2008 ///AMG C63.. Eurocharge Tune. RIP 
2019 AMG GLC43..wife's
03 F250 SD.. Edge Evo, AFE Stage 1 CAI
08 GT. JBA axle back, FRPP springs, FRPP swaybars.. daughter's
01 Cobra vert... wife's
I need a new toy
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