Stock ecotecs are an L37 engine bottom end not tough or strong enough for Eaton M90 supercharger, L67 which comes with supercharged ecotec is a better choice buy for around 2500-3500, shop around, other option is CRS kit which in a bit hard to get fitted correctly as the only guys who know how to redo the kit is widowmaker race engines caloundra qld, they basically refabricate the front of the blower move the throttlebody to the blower end and put a 8 ohm resistor across the manifold so the computer see's a continuous flow which in turn allows more fuel to injected through stock injectors.....i cant find anyone in melbourne that can do it, everyone keeps saying these blowers are useless, look at Powerup car, it is very quick, trying to follow in his footsteps.....