Dinan was the only firm to achieve CARB certification for E36 M3 superchargers (Vortech/Powerdyne setups, Stage 1-4 tunes); other brands (VF, Active Autowerke, Eurosport TwinScrew) offer more power but cannot pass California smog and depress resale among purists, while non-Dinan modifications often fail to recover their installed cost.
Dinan and supercharger modifications: CARB compliance and value
BMW E36 M3 (US-market, 1995-1999) · modifications