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Dorch Engineering HPFP upgrade full kit for BMW B48 and B58 engines

Dorch Engineering B48 / B58 HPFP Upgrade

$1,955.00

Dorch Engineering HPFP upgrades for the B48 and B58 platforms. Same part fits both engines — Dorch's HPFP cartridge is what any B48 or B58 build needs once it pushes Stage 2 calibration or above. The factory pump is sized for OEM boost; at Stage 2+ it can't sustain fuel rail pressure, which throws fuel pressure deviation codes and forces the calibration to pull timing.

Three stages

  • Gen1 DS15 Stage 1 — Dorch's entry-level cartridge, more flow over OEM. Bolt-in replacement. The right pump for Stage 2 calibrations on stock turbo (B48) or Stage 1-2 on B58. Fits Gen1 B48/B58 platforms (2014-2018 production roughly).
  • Gen1 DS25 Stage 2.5 — Dorch's higher-displacement cartridge for the same Gen1 pump body. The build path for Stage 3 B48 + Phantom I4 S2 hardware, or Stage 2.5 B58 builds running aggressive 93 octane or E-blend.
  • Gen2 DS25 Stage 2.5 — Same DS25 cartridge engineered for the Gen2 B58 pump body (2019+ production with the updated HPFP architecture). Confirm your specific year and chassis at intake — Gen1 vs Gen2 fitment is non-interchangeable.

Confirm Gen1 vs Gen2 at intake

The B58 platform received an updated HPFP design in late 2018 / early 2019 (varies by chassis and market). The Gen2 pump body is dimensionally different from the Gen1 — Dorch's cartridges are engineered specifically per generation. We confirm your pump generation at order intake based on VIN and production date before shipping.

For the B48 specifically

The B48 shares the HPFP body and cartridge design with the B58. Dorch markets these primarily for B58 applications, but they fit and function identically on B48 engines. Esse Werks confirms this fitment in our calibration database — we install these on B48 builds regularly.

Install

~2-3 hours at a competent shop. HPFP accessible on top of the engine without intake manifold removal on most chassis. Bolt-in replacement. Re-prime fuel system after install before flashing the matched Stage 2+ calibration.

Fitment

All B48 and B58 applications across BMW F-series, G-series, and MINI F-series. Confirm chassis + production year at intake to select correct Gen1 vs Gen2 variant.

Fits engines B48 · B58
Fits chassis F22 · F23 · F30 · F31 · F32 · F33 · F36 · F39 · F48 · F54 · F55 · F56 · F57 · F60 · G01 · G02 · G05 · G06 · G07 · G11 · G14 · G20 · G21 · G22 · G23 · G26 · G29 · G30 · G31 · G42
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.