HDP6 High-Pressure Fuel Pump

The Bosch 0261520520 HDP6 high-pressure fuel pump is engineered as a direct replacement or performance upgrade for B46, B48, and B58 engines. This Genuine Bosch pump offers a significant increase in fueling capabilities, with 1.178 cc/rev and a maximum pressure of 350 bar, compared to the stock HDP-5-EVO's 0.954 cc/rev and 250 bar. It's particularly beneficial for Gen 1 B58 owners planning to use ethanol blends or seeking to maximize performance. Users can expect potential power gains of 525-600 whp on pump gas and 450-525 whp on E30 fuel with this upgrade. For Gen 1 B58 engines, a wire harness extension (CTS-WH-008) is required and available separately. While some sources state no tuning is required for Gen 1 B58, others indicate tuning is needed to maximize performance gains. B46/B48 owners up to 2019 can also benefit from this upgrade, though it's advised to check if their vehicle already has the upgraded pump. Installation on Gen 1 B58/B48 engines may require rotating the connector housing for the fuel quantity control valve, a straightforward process, or using an extension harness. This high-pressure fuel pump is compatible with a wide range of BMW, Mini, and Toyota Supra models equipped with B48 and B58 variants, including various 2-series, 3-series, 4-series, 5-series, 7-series, X3, X4, X5, Z4, Cooper S, JCW, and Supra models from approximately 2014 to 2022, depending on the specific model and engine. Always verify fitment for your specific vehicle year, make, and model.