{"product_id":"dorch-b48-b58-hpfp-upgrade","title":"Dorch Engineering B48 \/ B58 HPFP Upgrade","description":"\u003cp\u003e\u003cstrong\u003eDorch Engineering HPFP upgrades for the B48 and B58 platforms.\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003ch3\u003eThree stages\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGen1 DS15 Stage 1\u003c\/strong\u003e — 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).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGen1 DS25 Stage 2.5\u003c\/strong\u003e — 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.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGen2 DS25 Stage 2.5\u003c\/strong\u003e — 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.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eConfirm Gen1 vs Gen2 at intake\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch3\u003eFor the B48 specifically\u003c\/h3\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003e~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.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eAll 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.\u003c\/p\u003e","brand":"Dorch Engineering","offers":[{"title":"Gen1 DS15 Stage 1 (~+15% Flow) \/ 1-4 Series Fitment","offer_id":43280686940221,"sku":"EW-FUEL-DORCH-B58-DS15","price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS15 Stage 1 (~+15% Flow) \/ 5-7 Series Fitment","offer_id":43280686972989,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS15 Stage 1 (~+15% Flow) \/ X3\/X4 Fitment","offer_id":43280687005757,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS25 Stage 2.5 (~+25% Flow, Gen1 Pumps) \/ 1-4 Series Fitment","offer_id":43280687038525,"sku":"EW-FUEL-DORCH-B58-DS25-G1","price":2485.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS25 Stage 2.5 (~+25% Flow, Gen1 Pumps) \/ 5-7 Series Fitment","offer_id":43280687071293,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen1 DS25 Stage 2.5 (~+25% Flow, Gen1 Pumps) \/ X3\/X4 Fitment","offer_id":43280687104061,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen2 DS25 Stage 2.5 (~+25% Flow, Gen2 Pumps 2019+) \/ 1-4 Series Fitment","offer_id":43280687136829,"sku":"EW-FUEL-DORCH-B58-DS25-G2","price":2545.0,"currency_code":"USD","in_stock":true},{"title":"Gen2 DS25 Stage 2.5 (~+25% Flow, Gen2 Pumps 2019+) \/ 5-7 Series Fitment","offer_id":43280687169597,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true},{"title":"Gen2 DS25 Stage 2.5 (~+25% Flow, Gen2 Pumps 2019+) \/ X3\/X4 Fitment","offer_id":43280687202365,"sku":null,"price":1955.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/Dorch-B58-Gen2-Full-Kit.webp?v=1781742886","url":"https:\/\/essewerks.com\/products\/dorch-b48-b58-hpfp-upgrade","provider":"Esse Werks","version":"1.0","type":"link"}