N55 DS15 HPFP Upgrade

The Dorch Engineering N55 DS15 HPFP Upgrade represents a significant advancement in fuel delivery for N55 engines. This "Stage 1.5" pump has been completely redesigned and optimized for enhanced performance. Externally, it features updated packaging for easier hose routing, while internally, the pressure chamber, spring rates, plunger depth, and volumetric efficiency have been reworked. This pump is capable of 250 bar operating pressure, with flow capacities reaching up to 550whp on E10 fuel and 400whp on E85 fuel when operating at 200 bar. This kit is designed as a complete, plug-and-play solution, ensuring OEM fitment without the need for cutting, bending, or crimping. It integrates seamlessly with the vehicle's DME, maintaining all stock safety features and sophistication. However, software modifications are required; users flashing with MHD or Bootmod3 can simply select the pump upgrade option, while others will need to have their .BIN file adjusted via WinOLS. Dorch Engineering emphasizes the "plug and play" nature of this kit, which includes a 250 bar capacity hardline for effortless connection to the fuel rail. The kit comes with a lifetime warranty, reflecting the reliability of their pumps. Comprehensive customer and tuning support are also provided, with access to professional engineers and a dedicated calibration engineer. The kit includes the HPFP with hardware, high and low-pressure lines, a low-pressure line bracket, and a plug-and-play adapter harness. This kit is compatible with various BMW models including F87 M2, F20/21 135i/135xi, F22/23 235i/235xi, F30/31/34 335i/335xi, F32/33/36 435i/435xi, F10/11 535i/535xi, F25/26 X3/X4 35i, F15/16 X5/X6 35i, E8X 135i, E9X 335i, E84 X1 35i, and E70/71 X5/X6 35i. Critically, it is ONLY compatible with 2013+ models equipped with an OE Bosch HPFP. The kit is NOT compatible with 2011-2012 N55 Vehicles.