{"product_id":"spool-b58-cam-fuel-lobe-mod","title":"Spool Performance B58 Gen1 Exhaust Cam — Fuel-Lobe Machining (+40% HPFP)","description":"\u003cp\u003e\u003cstrong\u003eSpool Performance fuel-lobe machining for the Gen1 B58 exhaust camshaft — a re-profiled HPFP drive lobe that raises direct-injection fuel volume by about 40%.\u003c\/strong\u003e The B58's high-pressure pump is driven off a lobe on the exhaust cam; Spool re-profiles that lobe with more lift on CNC live-tooling lathes, then re-hardens and polishes it, so the pump delivers more fuel per revolution.\u003c\/p\u003e\n\u003ch3\u003eWhat it is\u003c\/h3\u003e\n\u003cp\u003eA machining service on the exhaust camshaft, not an off-the-shelf part. Combined with Spool FX pumps and matched injectors, it pushes the direct-injection ceiling north of 900 whp on full E85 and past 1,000 whp on E50 or less. \u003cstrong\u003eOnly compatible with Spool Performance FX pumps.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eTwo ways to buy\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWe source the cam\u003c\/strong\u003e — we supply the core and return a finished, ready-to-install camshaft. \u003cstrong\u003eI provide my core\u003c\/strong\u003e — send us your exhaust cam and we machine, re-harden, polish, and return it (about two business days in the shop). Choose above.\u003c\/p\u003e\n\u003ch3\u003eWhere it fits in the build\u003c\/h3\u003e\n\u003cp\u003eA fuel-capacity mod on the high-pressure side, for big-power E85\/E50 B58 builds already running Spool fueling. We tune the engine to the fuel system.\u003c\/p\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eGen1 B58 (F-chassis) — M240i, 340i, 440i, 540i and related Gen1 B58 applications. Confirm your chassis in the selector.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"We source the cam","offer_id":43280685957181,"sku":"SP-B58-G1CAM","price":1415.0,"currency_code":"USD","in_stock":true},{"title":"I provide my core","offer_id":43280685989949,"sku":"SP-B58-G1CAM-CORE","price":1115.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/Spool_fuel_cam_b58.webp?v=1781742887","url":"https:\/\/essewerks.com\/products\/spool-b58-cam-fuel-lobe-mod","provider":"Esse Werks","version":"1.0","type":"link"}