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I think its a replica. Some parts dont make sence to be a genuine. And a local tuner says the eprom has no indetication to it being a real hsv 3800 tune but yet goes like it has one. And sladdo your right the msd do have higher voltage spark in the higher rev range. But as far as the coils go for stock vn s1 to vn S2 the later model coils have a higher voltage spark.
I just brought the champion coils from repco paid $58 each for them even after seeing the ones on e-bay for $40. I just replaced the plugs to platinum and leads to high performance and the champion coils, any ideas as it now backfires and run's really rough. VN CALAIS S1 V6