Dorch Engineering DS25 HPFP Upgrade for F/G chassis B58 Gen 1

 

The DS25 is the latest product from Dorch Engineering, the creators of the original B58 direct fuel injection upgrade. This "Stage 2.5" is redesigned for superior performance, with improved packaging and OEM hose routing for easier coil pack and spark plug replacement. Internally, we've also improved the pressure chamber, spring rates, and plunger depth, while optimizing the pump's volumetric efficiency for greater flow. These improvements make the DS25 the most reliable and capable B58 pump, capable of running at up to 250 bar for improved injector performance.

 

Beyond the pump performance, why choose Dorch?

• PLUG AND PLAY: This is the ONLY true plug and play OEM fitment option on the market. Our kit includes our 250 bar capacity hardline to effortlessly connect our HPFP to your fuel rail (versus the time consuming process of bending and damaging the OEM line to fit).
• LIFETIME WARRANTY: The reason we can offer this is simply because our pumps are THAT reliable. That said, on the slim chance you have an issue, we’ve got your back!
• CUSTOMER SUPPORT: Ask around! It’s no secret that we offer unrivaled 24/7 support with REAL help. You’re an email away from professional engineers, technicians, and our tuner, who can solve anything you throw at them.
• TUNING SUPPORT: We aren’t just a hard part’s manufacturer. We have a dedicated calibration engineer in-house who painstakingly develops all of our HPFP files using OEM calibration tools and supports a global tuning network.

 
Kit Contents:

• Dorch Lifetime Warranty
• HPFP w/ Hardware
• Dorch High Pressure Line
• PTFE Low Pressure Line
• Low Pressure Hose Bracket
• Plug and Play Adapter Harness

Kit Fitment:

F20/21 – 140i, 140xi
F22/23 – 240i, 240xi
F30/31/34 – 340i, 340xi
F32/33/36 – 440i, 440xi

G30/31 – 540i, 540xi *
G32 – 640i, 640xi *
G11/12 – 740i, 740xi *

G01 – X3 m40i *
G02 – X4 m40i *

* ONLY UP TO 2019 Model Year
KIT NOT COMPATIBLE with Gen2 B58 Vehicles