When modifying or rebuilding and engine, or for a simple FlexFuel conversion, the stock fuel pump is often insufficient and can't let fuel flow through quick enough. The consequences can be disastrous, in the worst case a broken engine (a lean air/fuel mix causing knocking).

The Deatschwerks DW65C (C for Compact) can fit in many modern brackets, in which a standard size pump (such as the DW200) won't. The Deatschwerks DW65C fuel pump is often chosen for engine upgrades than can pass 500 hp, because it can feed 4x1100 cc / min injectors continuously, under 3 bars of fuel pressure (or 6x700 cc injectors). Equipped with a silent turbine and specifically deigned for ethanol (E85), it's the only pump on the market with a 3 year warrantee (with its DW200 equivalent).

Please note that a high flow fuel pump won't increase your vehicle's power. It allows you to replace your existing pump that may be worn or insufficient, and can withstand an increased fuel flow for engine upgrades with high boost pressure, bigger injectors, or other modifications.