{"title":"Engine Electrical","description":null,"products":[{"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"},{"product_id":"cold-spark-plug-set-b58","title":"Cold Spark Plug Set — B58","description":"\u003cp\u003e\u003cstrong\u003eOne-step-colder spark plug set for the B58 platform.\u003c\/strong\u003e Six plugs (the B58 inline-six cylinder count), NGK or Denso, validated heat range for B58 builds running Stage 2 or higher boost. Standalone — buy the plugs without the matched calibration if you've already got your tune sorted.\u003c\/p\u003e\n\n\u003ch3\u003eB58 specifics\u003c\/h3\u003e\n\u003cp\u003eThe OEM plug heat range was calibrated for the stock boost window; sustained operation in the Stage 2+ window crosses into the heat-soak risk zone for the factory-spec plug. Colder heat range pulls combustion heat out faster — the trade-off is slightly worse low-load self-cleaning, which the B58's modern direct-injection strategy handles cleanly.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet of 6 one-step-colder plugs (NGK or Denso, model spec confirmed at intake based on your current B58 generation — B58TU0 \/ B58TU1 \/ B58TU2 have slightly different plug specs)\u003c\/li\u003e\n  \u003cli\u003eOEM-equivalent gap pre-set at 0.025\" (verify with feeler gauge before install)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePair with the calibration\u003c\/h3\u003e\n\u003cp\u003eFor Stage 2 or Stage 3 calibrations bundled with the matched plug set, use the standalone tune products at \u003ca href=\"\/products\/tune-g20-m340i\"\u003ethe chassis-specific tune page\u003c\/a\u003e and add this plug set to cart together. Bundle pricing for Cold Plugs + Tune is currently only published for the B48 platform; B58 bundle pricing is per-build at intake.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eB58 platform — all generations (B58TU0 \/ B58TU1 \/ B58TU2). Confirm your specific engine generation at intake — we ship the plug spec matched to your year and chassis.\u003c\/p\u003e","brand":"Esse Werks","offers":[{"title":"Default Title","offer_id":43280734421053,"sku":"EW-PLUG-COLD-B58","price":135.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/dinan_cold_spark_BLK01.webp?v=1781742811"},{"product_id":"cold-spark-plug-set-s58","title":"Cold Spark Plug Set — S58","description":"\u003cp\u003e\u003cstrong\u003eOne-step-colder spark plug set for the S58 platform.\u003c\/strong\u003e Six plugs, NGK or Denso, validated heat range for G8X \/ G87 \/ F97 \/ F98 M-cars running Stage 2 or higher boost. The S58's closed-deck block and twin-turbo configuration runs cylinder pressures meaningfully higher than the B58 at the same gear's peak boost — heat range matters more on this engine than on any other current BMW.\u003c\/p\u003e\n\n\u003ch3\u003eS58-specific considerations\u003c\/h3\u003e\n\u003cp\u003eThe S58 ships with a relatively conservative OEM plug heat range. At Stage 1 calibration on stock turbos, the OEM plugs remain within margin. At Stage 2 (meaningful boost peak) and especially Stage 3 (~26+ psi with upgraded turbos), the OEM plug heat range becomes the limiting factor on safe timing advance during sustained track-driven pulls. Going one step colder is mandatory at Stage 2+ for any S58 build you're driving hard.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eSet of 6 one-step-colder plugs (NGK or Denso — model spec matched to your S58 variant at intake)\u003c\/li\u003e\n  \u003cli\u003eOEM-equivalent gap pre-set; verify with feeler gauge before install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eService interval consideration\u003c\/h3\u003e\n\u003cp\u003eFor S58 builds seeing track time, we recommend plug inspection at half the OEM service interval — every ~15,000 miles instead of 30,000 — and replacement on the early side. Plug condition is the canary for combustion behavior; if the plugs show heat-scoring or unusual erosion patterns, the calibration wants a closer look.\u003c\/p\u003e\n\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003eS58 platform — G80 M3, G82 M4, G83 M4 Convertible, G87 M2, F97 X3 M, F98 X4 M. All variants supported. Confirm production year at intake (CS variants may run slightly different spec).\u003c\/p\u003e","brand":"Esse Werks","offers":[{"title":"Default Title","offer_id":43280734453821,"sku":"EW-PLUG-COLD-S58","price":145.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/files\/dinan_cold_spark_BLK01.webp?v=1781742811"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/2553\/8109\/collections\/dinan_cold_spark_BLK01.webp?v=1781758330","url":"https:\/\/essewerks.com\/collections\/engine-electrical.oembed","provider":"Esse Werks","version":"1.0","type":"link"}