{"product_id":"cold-spark-plug-set-b48","title":"Cold Spark Plug Set — B48","description":"\u003cp\u003e\u003cstrong\u003eOne-step-colder spark plug set for the B48 platform.\u003c\/strong\u003e NGK or Denso, validated heat range for B48 builds running Stage 2 or higher boost. Set of 4 plugs — the full B48 cylinder count. Sold standalone (without calibration) for customers who already have a tune dialed in and need plugs for the next service interval.\u003c\/p\u003e\n\n\u003ch3\u003eWhy colder plugs at higher stages\u003c\/h3\u003e\n\u003cp\u003eHeat range determines how fast the plug dissipates combustion heat into the cooling jacket. The B48 OEM plug heat range is calibrated for stock boost levels. At Stage 2+ boost, the OEM plug reaches pre-ignition temperatures sooner than the cooling system can pull heat out. Going one step colder buys pre-ignition margin — translating directly to safer timing advance in the cells where the engine is most knock-limited.\u003c\/p\u003e\n\n\u003ch3\u003eWhen to install\u003c\/h3\u003e\n\u003cp\u003eAt normal service interval for tuned B48 builds at Stage 2 or above. Earlier if you're running aggressive fueling (E-blend, methanol injection) where plug heat range matters most.\u003c\/p\u003e\n\n\u003ch3\u003eBundled with tune option\u003c\/h3\u003e\n\u003cp\u003eIf you're buying plugs at the same time as a Stage 2 or Stage 3 calibration, the Cold B48 Spark Plug Bundle includes the matched calibration and packages both for 8% under the combined à la carte price.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eB48 platform — all F-series and G-series BMW (B48B20O1 engine), all F-series MINI Cooper S and JCW (B48A20A \/ B48A20B). Confirm engine code at order if uncertain.\u003c\/p\u003e","brand":"Esse Werks","offers":[{"title":"Default Title","offer_id":43280732192829,"sku":"EW-PLUG-COLD-B48","price":95.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/dinan_cold_plug_BLK02.webp?v=1781742811","url":"https:\/\/essewerks.com\/products\/cold-spark-plug-set-b48","provider":"Esse Werks","version":"1.0","type":"link"}