i guess i should have mentioned that all the M's i saw were E36's and one E36/5.
Dinan's flagship product is its supercharger kit. All the rest of the engine products they sell, only complement it. Which is how it should be really. The cinergy of the parts used, is more important than the gains each individual part produces alone.
Thier parts are extremely expensive... i agree. But like anything else, you have to go a little outside of the box to find the power that thier kis can really make.