tested my batt/alt/starter the other day
 

was testing my batt at work the other day

12.57v from the batt alone, 404CCA and its rated at 400CCA
10.74v when cranking
all of this means nothing, but this next part actually suprised me a bit


alt
load on 13.39v (highbeams, radio, blower motor)
load off 14.05v

i wouldve expected shittier numbers from a factory orignal alt and shitty wiring, battery isnt too new either, plus its in phx in the summer with 115 degree temps

-Ben Martin

Haven't seen any bad wiring issues yet for my S5s. Think as long as you don't get the ECU area wet and don't hack the harness, it's ok.