{"product_id":"bc-racing-hm-series-coilovers-2001-2006-bmw-330ci-convertible-rwd-e46","title":"BC Racing HM Series Coilovers for 2001-2006 BMW 330Ci Convertible RWD (E46)","description":"\u003cp\u003eBC Racing HM Series Coilovers for the 2001-2006 BMW 330Ci Convertible (E46) combine the inverted-damper durability of the RM Series with the independent compression and rebound tuning of the ER Series, BC's pick for track-day McPherson-strut builds. Every kit is extensively tested on the 330Ci Convertible E46 chassis and refined until it balances ride quality with performance, the reason 330Ci Convertible coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide.\u003c\/p\u003e \u003cp\u003eHM Series kits use an inverted mono-tube damper on McPherson-strut chassis (upright on double-wishbone) with external reservoirs feeding separate compression and rebound adjusters. The result: the tuning depth of the ER Series inside the heavy-load chassis architecture of the RM. The off-the-shelf setup from BC Racing is deliberately balanced, spring rates and valving chosen so the kit feels comfortable day-to-day without giving up performance when you push it. Drivers who want a different recipe can spec Swift Springs, custom spring rates, or fully custom valving at checkout; BC will tune the dampers to match, which is a depth of customization most brands only offer on their top-tier kits.\u003c\/p\u003e \u003cp\u003eBC Racing has been manufacturing adjustable coilovers since 2004 and is one of the most popular coilover brands in the automotive tuning industry for a reason: competitive pricing, deep customization, proven reliability, and a fully rebuildable damper design that lasts years instead of seasons. These 330Ci Convertible coilovers arrive tuned for the E46 chassis and ready to bolt in, no break-in period, no guessing at setup. Every kit ships with a 2-year manufacturer warranty, lifetime access to BC service parts (pistons, seals, shafts, no unit replacement required when it's time for a rebuild), and in-house tech support from both BC Racing and the Springrates team.\u003c\/p\u003e \u003ch3\u003eFeatures\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e30-level rebound adjustment (top of damper)\u003c\/li\u003e \u003cli\u003e30-level compression adjustment (external reservoir)\u003c\/li\u003e \u003cli\u003eInverted mono-tube damper on McPherson-strut vehicles; upright on double-wishbone\u003c\/li\u003e \u003cli\u003eCombines RM Series inverted-damper architecture with ER Series 2-way adjustability\u003c\/li\u003e \u003cli\u003eRide height adjustable independent of spring preload\u003c\/li\u003e \u003cli\u003eUpper mount hardware varies by chassis, camber plates, pillowball, or reused OEM mounts. See the Specifications table for what's included on your kit.\u003c\/li\u003e \u003cli\u003eSwift Spring and custom spring rate upgrades available at checkout\u003c\/li\u003e \u003cli\u003eCustom damper valving paired with custom spring rates on request\u003c\/li\u003e \u003cli\u003eFully rebuildable, replacement parts available from BC for the life of the shock\u003c\/li\u003e \u003cli\u003e2-year manufacturer warranty against defects\u003c\/li\u003e \u003c\/ul\u003e \u003ch5\u003eSpecifications\u003c\/h5\u003e \u003ctable class=\"table table-striped table-primary\"\u003e \u003ctbody\u003e \u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003eI-90-HM\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003ePart Name\u003c\/td\u003e\n\u003ctd\u003eHM Series Coilovers\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eVehicle\u003c\/td\u003e\n\u003ctd\u003e2001-2006 BMW 330Ci Convertible\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eDrivetrain\u003c\/td\u003e\n\u003ctd\u003eRWD\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eChassis Code\u003c\/td\u003e\n\u003ctd\u003eE46\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eDamping Adjustment\u003c\/td\u003e\n\u003ctd\u003e2-Way (30 levels rebound\/30 levels compression)\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eRide-Height Adjustable\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSpring Rate - Front\u003c\/td\u003e\n\u003ctd\u003e6 kg\/mm\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSpring Rate - Rear\u003c\/td\u003e\n\u003ctd\u003e8 kg\/mm\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSpring Size - Front\u003c\/td\u003e\n\u003ctd\u003e62-180-6K\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSpring Size - Rear\u003c\/td\u003e\n\u003ctd\u003e62-150-8K\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSwift Springs - Front\u003c\/td\u003e\n\u003ctd\u003e62-178-X\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSwift Springs - Rear\u003c\/td\u003e\n\u003ctd\u003e62-152-X\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eCamber Plates - Front\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eCamber Plates - Rear\u003c\/td\u003e\n\u003ctd\u003eNot Applicable\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSuspension Design - Front\u003c\/td\u003e\n\u003ctd\u003eTrue Coilover\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eSuspension Design - Rear\u003c\/td\u003e\n\u003ctd\u003eDivorced\u003c\/td\u003e\n\u003c\/tr\u003e \u003ctr\u003e\n\u003ctd\u003eNotes\u003c\/td\u003e\n\u003ctd\u003e\u003cul\u003e\n\u003cli\u003eDamping Extenders are not compatible.\u003c\/li\u003e\n\u003cli\u003eFits Non-M models only (does not fit the M3).\u003c\/li\u003e\n\u003cli\u003eThe HM Series is not available in Extreme-Low configuration.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/td\u003e\n\u003c\/tr\u003e \u003c\/tbody\u003e \u003c\/table\u003e \u003ch5\u003eVehicle Fitment\u003c\/h5\u003e \u003cul\u003e  \u003cli\u003e2001 BMW 330Ci Convertible RWD (E46)\u003c\/li\u003e \u003cli\u003e2002 BMW 330Ci Convertible RWD (E46)\u003c\/li\u003e \u003cli\u003e2003 BMW 330Ci Convertible RWD (E46)\u003c\/li\u003e \u003cli\u003e2004 BMW 330Ci Convertible RWD (E46)\u003c\/li\u003e \u003cli\u003e2005 BMW 330Ci Convertible RWD (E46)\u003c\/li\u003e \u003cli\u003e2006 BMW 330Ci Convertible RWD (E46)\u003c\/li\u003e \u003c\/ul\u003e","brand":"BC Racing","offers":[{"title":"Default Title","offer_id":64575786090865,"sku":"I-90-HM","price":2545.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2534\/9336\/files\/bc-racing-hm-series-coilovers-2007-2013-bmw-m3-w-o-edc-e90-e92-i-39-hm-37875359252722.jpg?v=1740535185","url":"https:\/\/bc.springrates.com\/products\/bc-racing-hm-series-coilovers-2001-2006-bmw-330ci-convertible-rwd-e46","provider":"BC Racing - Springrates.com","version":"1.0","type":"link"}