{"product_id":"ast-5100-series-coilovers-alpina-rwd-e90-e91-e92-e93-bmw-e88-e81-e82-e87-128i-135i-135is-323i-325i","title":"AST Suspension 5100 Street Series Coilovers - BMW 1-Series (E81\/E82\/E87\/E88) \/ 3-Series and Alpina Applications (E90\/E91\/E92\/E93) (RWD)","description":"\u003cp\u003eThe AST Suspension 5100 Series suspension for Alpina\/\/\/\/BMW\/128i\/135i\/135is\/323i\/325i (E90\/E91\/E92\/E93\/E88\/E81\/E82\/E87) (RWD) provides a tunable damper system for drivers developing a setup around their vehicle, tires and intended use.\u003c\/p\u003e\u003cp\u003eRebound adjustment changes resistance as the suspension extends after compression. It provides a focused damping adjustment for evaluating how the car recovers from bumps and responds between braking, cornering and acceleration. Work from a recorded baseline rather than assuming the firmest setting produces the best response.\u003c\/p\u003e\u003ch3\u003eKey specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAdjustable rebound damping.\u003c\/li\u003e\n\u003cli\u003eMonotube damper construction.\u003c\/li\u003e\n\u003cli\u003eRebuildable dampers.\u003c\/li\u003e\n\u003cli\u003eRide-height adjustment on the supported configuration.\u003c\/li\u003e\n\u003cli\u003eOEM top-mount compatibility is application-dependent; do not assume replacement mounts are included.\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: ACU-B1601SD.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eDamper construction follows the suspension layout. Do not assume every unit is inverted or that every upper mount provides camber adjustment. Exact mount configuration and any application-specific installation requirements should be checked for this part number.\u003c\/p\u003e\u003ch3\u003eInstallation and setup\u003c\/h3\u003e\u003cp\u003eCheck the application, wheel clearance and suspension travel before selecting the final ride height. Establish alignment and, where appropriate, corner weights before tuning damping. Change one setting at a time and record the result so a useful baseline can be restored.\u003c\/p\u003e\u003ch3\u003eVehicle fitment\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYear\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSubmodel\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e128i\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2008-2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e135i\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e135is\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e325i\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007-2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e328i\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2006\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e330i\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2007-2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e335i\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2011-2013\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e335is\u003c\/td\u003e\n\u003ctd\u003eBase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"AST","offers":[{"title":"Default Title","offer_id":68119403299066,"sku":"ASTACU-B1601SD","price":3546.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0325\/6352\/7739\/files\/c4e8df645a6408f85b65f1a384ca6753L_430388d0-286a-4f0e-b3bd-dcee92f8202a.jpg?v=1794040051","url":"https:\/\/lgcracing.com\/products\/ast-5100-series-coilovers-alpina-rwd-e90-e91-e92-e93-bmw-e88-e81-e82-e87-128i-135i-135is-323i-325i","provider":"Legacy Racing","version":"1.0","type":"link"}