{"product_id":"ast-5100-street-coilovers-for-audi-a4-s4-a5-s5-b9","title":"AST 5100 Street Coilovers for Audi A4, S4, A5 \u0026 S5 (B9)","description":"\u003cp\u003eCoilovers for the B9 Audi A4, front-drive and quattro, the S4, the front-drive A5 and the S5, 2015 to 2023, which share one AST kit: the 1-way 5100 Street, adjustable for rebound damping, with springs in the kit. AST list it with a 48.5mm front strut for every car but the A4 quattro: check yours before you order.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e5100 Street: 1-way, adjustable for rebound damping, springs included\u003c\/li\u003e\n\u003cli\u003eAudi A4 and S4 (B9), A5 and S5 (F5), 2015 to 2023\u003c\/li\u003e\n\u003cli\u003eFor cars with 48.5mm front struts, as the table shows\u003c\/li\u003e\n\u003cli\u003eMonotube dampers with a 12-position rebound adjuster\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCheck before you order\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eAST list this kit for the front-drive A4 and A5, the S4 and the S5 with 48.5mm front struts, as the table shows: check your car's before you order.\u003c\/li\u003e\n\u003cli\u003eIf your car has adaptive (electronically controlled) dampers, please ask us before ordering: AST's data does not say whether anything else is needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eChoose your series\u003c\/h3\u003e\n\u003cp\u003eEvery AST damper is a monotube: nothing inside can aerate or foam, which AST say keeps the valving responsive.\u003c\/p\u003e\n\u003ch4\u003e5100 Street (AST ACU)\u003c\/h4\u003e\u003cp\u003eAST's 1-way 5100 Street kit, adjustable for rebound damping. Springs come in the kit. The rebound adjuster has 12 positions, and the dampers can be rebuilt.\u003c\/p\u003e\n\u003cp\u003eAST part number: ACU-A2110S\u003c\/p\u003e\n\u003cp\u003eThe photos are AST's own sample shots of each series, not of the kit for your car, which is made for its suspension and differs in detail.\u003c\/p\u003e\n\u003ctable class=\"spec-table\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries\u003c\/th\u003e\n\u003ctd\u003e5100 Street (AST ACU)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAST part numbers\u003c\/th\u003e\n\u003ctd\u003eACU-A2110S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ctable class=\"fitment-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eVersion\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003ctd\u003eA4\u003c\/td\u003e\n\u003ctd\u003eB9 quattro\u003c\/td\u003e\n\u003ctd\u003e2015-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003ctd\u003eA4\u003c\/td\u003e\n\u003ctd\u003eB9, 48.5mm strut\u003c\/td\u003e\n\u003ctd\u003e2015-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003ctd\u003eA5\u003c\/td\u003e\n\u003ctd\u003eB9, 48.5mm strut\u003c\/td\u003e\n\u003ctd\u003e2015-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003ctd\u003eS4\u003c\/td\u003e\n\u003ctd\u003eB9, 48.5mm strut\u003c\/td\u003e\n\u003ctd\u003e2015-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudi\u003c\/td\u003e\n\u003ctd\u003eS5\u003c\/td\u003e\n\u003ctd\u003eF5, 48.5mm strut\u003c\/td\u003e\n\u003ctd\u003e2015-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"AST Suspension","offers":[{"title":"Default Title","offer_id":57568002703740,"sku":"ACU-A2110S","price":2916.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/9208\/4867\/files\/ast-suspension-ast-audi-b9-ast-5100-street-coilovers-for-audi-a4-s4-a5-s5-b9-1.jpg?v=1791210649","url":"https:\/\/fdracing.co.uk\/products\/ast-5100-street-coilovers-for-audi-a4-s4-a5-s5-b9","provider":"FD Racing","version":"1.0","type":"link"}