We start with original BMW vacuum pump housings, into which we install our Dorch Engineering camshaft using proprietary production tools and validation equipment.
Because the S55 engine features the smallest Bosch-style HPFP cam lobes, we’re able to achieve a significant increase in fuel flow without any compromise in durability or reliability.

No Cutting, No Bending, No Crimping – True Plug & Play

• Fully reversible installation

• No special tuning required

• 100% compatibility with OEM DME and emissions systems

• Best price-to-performance ratio on the market

• Backed by the Dorch Lifetime Warranty

Fuel System Performance – S55 HPFP

At around 950 HP on E85, the S55LK still has headroom — the limiting factor becomes the available aftermarket injectors.

Tuning & Compatibility

No software changes are required to run this kit.
However, for maximum performance, ready-made calibrations are available through Bootmod3 and MHD — simply select the “Lift Kit” option when flashing your map.

Note: The S55 fuel system is limited by the OEM injectors.
To fully unlock the potential of this upgrade, we recommend BMW S63 EU5 OEM injectors, which allow up to 800 WHP on full E85.

Installation Guide

S55 HPFP Lift Kit Installation Instructions

KIT CONTENTS

• Dorch Lifetime Warranty

• Dorch-modified vacuum pump assembly

• Vacuum pump block-off plate

• OEM-grade pump gasket

APPLICATIONS

• BMW F80 M3 Sedan – all variants

• BMW F82 M4 Coupe – all variants

• BMW F83 M4 Convertible – all variants

• BMW F87 M2 – Competition & CS only