{"product_id":"dorch-s55-hpfp-lift-kit","title":"Dorch Engineering S55 HPFP Lift Kit","description":"\u003cp\u003e\u003cstrong\u003eDorch Engineering Lift Kit for the S55 HPFP.\u003c\/strong\u003e 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.\u003c\/p\u003e\n\n\u003ch3\u003eWhy the S55 needs this\u003c\/h3\u003e\n\u003cp\u003eStage 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.\u003c\/p\u003e\n\n\u003ch3\u003eCore deposit required\u003c\/h3\u003e\n\u003cp\u003eThis 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.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eTwo Dorch-designed HPFP cartridges (one per turbo bank)\u003c\/li\u003e\n  \u003cli\u003eInstallation hardware\u003c\/li\u003e\n  \u003cli\u003eDetailed install documentation (Dorch's PDF — we'll email it at order)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstall\u003c\/h3\u003e\n\u003cp\u003e~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.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e2014-2020 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.\u003c\/p\u003e\n\u003cp\u003eIf you're sourcing fueling alongside the calibration, the \u003ca href=\"\/products\/fueling-kit-s55\"\u003eFueling Kit — S55\u003c\/a\u003e bundles the matched pump + tune for 8% under à la carte.\u003c\/p\u003e","brand":"Dorch Engineering","offers":[{"title":"Default Title","offer_id":43280695394365,"sku":"EW-FUEL-DORCH-S55-LIFT","price":1615.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/dorch_S55LK.webp?v=1781742887","url":"https:\/\/essewerks.com\/products\/dorch-s55-hpfp-lift-kit","provider":"Esse Werks","version":"1.0","type":"link"}