Introducing a groundbreaking innovation for the N55 community! This advanced upgrade increases fuel flow by up to 49% over existing N55 HPFP kits — unlocking unprecedented power potential while maintaining full OEM direct-injection integration.

Built from genuine BMW vacuum pumps, each unit is re-engineered with Dorch Engineering’s custom camshaft and precision-tested components. The result: massive fuel delivery gains in a clean, OEM-style package that retains full DME control and reliability.

Experience direct injection performance never before seen on N55 platforms — from street builds to 1200hp monsters, the Dorch N55 Lift Kit redefines fueling limits.

Performance Table – N55 Lift Kit

Technical Notes:
When pairing N55LK with DS25 HPFP (or DS2), ensure a minimum power threshold for smooth tuning. The DS15 HPFP (or DS1) has no such limit — always use the +49% Lift Kit for maximum effect.

Tuning Support:

Software calibration is required. Optimized maps are available via Bootmod3 (and soon MHD). Simply enable the “Lift Kit” option during map flash.
For setups exceeding HPFP Stage 2 capacity, OEM BMW S63 EU5 injectors are recommended to reach up to 800whp on full E85.

Kit Includes:

• Dorch lifetime warranty

• Dorch vacuum pump

• HPFP LK mounting flange

• Vacuum pump cap

• Pump gasket

Applications:

• 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 *
• E70/71 – X5/X6 35i *

Compatible with all 2013+ N55 engines using Bosch HPFP.
Not compatible with 2011–2012 N55 models or factory Continental HPFP.