SHOP FUEL DORCH ENGINEERING S55 HPFP LIFT KIT
Dorch Engineering S55 HPFP lift kit for BMW S55 — F80 M3 / F82 M4 / F87 M2

Dorch Engineering S55 HPFP Lift Kit

$1,615.00

Dorch Engineering Lift Kit for the S55 HPFP. The S55 has TWO high-pressure fuel pumps (one per turbo bank). This kit pushes more fuel flow out of the OEM HPFP architecture by installing a proprietary Dorch-designed cartridge inside each pump body. Preserves OEM packaging, OEM fuel lines, and OEM electrical — the upgrade lives entirely inside the cartridges.

Why the S55 needs this

Stage 2 S55 and especially Stage 3 (on E85) calibrations exceed what the OEM HPFP pair can sustain at sustained boost. The symptom is fuel pressure deviation under load, which the calibration handles by pulling timing — meaning you don't get the output the tune is designed for. The Lift Kit is the cleanest way there without going to a full pump replacement.

Core deposit required

This is a core-exchange product. Your existing OEM HPFP cartridges ship to Dorch within 30 days of receiving the upgrade; you receive the core deposit refund once Dorch confirms intact returns. If you don't return the cores within 30 days, the core deposit is forfeited. We handle the core return paperwork on your behalf at order intake.

What's in the box

  • Two Dorch-designed HPFP cartridges (one per turbo bank)
  • Installation hardware
  • Detailed install documentation (Dorch's PDF — we'll email it at order)

Install

~3-4 hours at a competent shop. F8X M-car HPFP access requires partial intake manifold removal — more involved than the inline-six platforms. Re-prime fuel system after install before flashing the matched Stage 2+ calibration.

Fitment

2014-2020 BMW F80 M3, F82 M4, F83 M4 Convertible. 2018-2021 F87 M2 Competition (S55 engine, post-2018). For the pre-Competition F87 M2 (2016-2018, N55 engine), see the Dorch N55 HPFP Upgrade.

If you're sourcing fueling alongside the calibration, the Fueling Kit — S55 bundles the matched pump + tune for 8% under à la carte.

Fits engine S55
Fits chassis F80 · F82 · F83 · F87
Category Fuel
Manufacturer Dorch Engineering
Install effort ~2.5 hours
What this is

A Part Recalibration is one focused revision built around the part you just bought. We take logs on your car as it runs now, on your current tune, then make a single full revision so this specific part delivers what it should. Hardware only does its job with a calibration shaped around it.

We bundle that tuning with the part right here, whatever brand the hardware is. If you want a fresh start across all your hardware, a Full Tune is the step up: a new base map, three revisions, and a written report.

This is a bootmod3 calibration. We tune through your own active BM3 license, so you'll need bootmod3 active on your car to load it.

Ships from Boca Raton, FL.

Step up to a Full Tune?

You've added a Part Recalibration to more than one part. At that point a complete tune does more for you: a Full Tune lays down a fresh base map and three revisions so all of your new hardware is dialed in together, with a written report at the end. We can roll your recalibrations into one Full Tune for $395 — below our standalone Full Tune, which starts at $495 for a four-cylinder and $595 for a six.

The Full Tune is a bootmod3 calibration — it loads through your active BM3 license, the same one you confirmed for the recalibration.

WHY WE SHIP DORCH ENGINEERING
Dorch Engineering fills the gap where a single fuel system runs out of injector or pump to feed the power a build is asking for. Their high-pressure fueling work is built for the direct-injection BMW engines that hit a fuel-delivery wall before they hit a mechanical one. We choose Dorch when a customer commits to ethanol content or big-power targets that the factory HPFP and DI injectors can no longer support cleanly. This is fueling for the upper end of a build, where getting the supply right is the difference between a calibration that holds and one that runs lean where it matters.