{"product_id":"ast-coilovers-for-bmw-3-series-g20-g21-2-series-g42-rwd","title":"AST Coilovers for BMW 3 Series G20\/G21 \u0026 2 Series G42 (RWD)","description":"\u003cp\u003eCoilovers for the rear-drive G20 and G21 3 Series and the G42 2 Series, from 2018 on. Six AST series are offered, from the 5100 Street, non-inverted or inverted, to the 5300 3-Way, and every one adjusts for ride height and rebound damping.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSix series, from the 5100 Street to the 5300 3-Way\u003c\/li\u003e\n\u003cli\u003e3 Series G20 318i to M340i and G21 318i to 330i; 2 Series G42 218i to M240i\u003c\/li\u003e\n\u003cli\u003eMonotube dampers throughout, with a 12-position rebound adjuster\u003c\/li\u003e\n\u003cli\u003eCamber-adjustable front top mounts on the Street Performance, Clubracing and motorsport kits\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, non-inverted (AST ACS)\u003c\/h4\u003e\u003cp\u003eThe 5100 Street kit with conventional, non-inverted monotube dampers, adjustable for rebound damping and ride height. The front dampers are coilovers; at the rear the spring and damper stay separate, as the car was built. Springs come in the kit, which works with the car's original top mounts. AST fix the rear spring rate for each car. The rebound adjuster has 12 positions, and the dampers can be rebuilt.\u003c\/p\u003e\n\u003cp\u003eAST part number: ACS-B2021SD\u003c\/p\u003e\n\u003ch4\u003e5100 Street, inverted (AST ACU)\u003c\/h4\u003e\u003cp\u003eThe 5100 Street kit with inverted monotube dampers, adjustable for rebound damping and ride height. The front dampers are coilovers; at the rear the spring and damper stay separate, as the car was built. Springs come in the kit, which works with the car's original top mounts. AST fix the rear spring rate for each car. The rebound adjuster has 12 positions, and the dampers can be rebuilt.\u003c\/p\u003e\n\u003cp\u003eAST part number: ACU-B2021SD\u003c\/p\u003e\n\u003ch4\u003e5100 Street Performance (AST ACT)\u003c\/h4\u003e\u003cp\u003eThe 5100 Street kit with camber-adjustable top mounts added at the front. Inverted monotube dampers, adjustable for rebound damping and ride height; coilovers at the front, and a separate spring and damper at the rear as the car was built. Adjustable camber lets you set the angle of the front wheels, and with it how the front end grips. AST fix the rear spring rate for each car. The rebound adjuster has 12 positions, and the dampers can be rebuilt.\u003c\/p\u003e\n\u003cp\u003eAST part number: ACT-B2021SD\u003c\/p\u003e\n\u003ch4\u003e5100 Clubracing (AST ACC)\u003c\/h4\u003e\u003cp\u003eThe 1-way kit for cars that see track days as well as daily miles: inverted monotube coilovers front and rear, with top mounts at both ends. The front top mounts adjust for camber; the rear ones are solid. Spring rates can be changed to suit. Ride height adjusts, the rebound adjuster has 12 positions, and the dampers can be rebuilt.\u003c\/p\u003e\n\u003cp\u003eAST part number: ACC-B2022SD\u003c\/p\u003e\n\u003ch4\u003e5200 2-Way Motorsport (AST RIV)\u003c\/h4\u003e\u003cp\u003eRebound and compression damping each have their own adjuster, and ride height adjusts too. Compression damping sets how quickly the suspension moves in; rebound sets how quickly it extends again. The dampers work with external reservoirs, mounted remotely. The struts are inverted, which AST use because that design copes with heavy sideways loads and with braking. Where the car needs them, camber-adjustable front and solid rear top mounts are included. Spring rates can be changed, and the rebound adjuster has 12 positions. AST made it first of all for track driving.\u003c\/p\u003e\n\u003cp\u003eAST part number: RIV-B2022SD\u003c\/p\u003e\n\u003ch4\u003e5300 3-Way Motorsport (AST RAC)\u003c\/h4\u003e\u003cp\u003eThree separate damping adjusters - rebound, low-speed compression and high-speed compression - plus adjustable ride height. Low-speed compression looks after slow, gradual movement of the suspension; high-speed compression looks after sharp, hard hits. The dampers work with external reservoirs, mounted remotely. The struts are inverted, which AST use because that design copes with heavy sideways loads and with braking. Where the car needs them, camber-adjustable front and solid rear top mounts are included. Spring rates can be changed, and the rebound adjuster has 12 positions. AST's kit for the most committed circuit drivers.\u003c\/p\u003e\n\u003cp\u003eAST part number: RAC-B2022SD\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, non-inverted (AST ACS); 5100 Street, inverted (AST ACU); 5100 Street Performance (AST ACT); 5100 Clubracing (AST ACC); 5200 2-Way Motorsport (AST RIV); 5300 3-Way Motorsport (AST RAC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAST part numbers\u003c\/th\u003e\n\u003ctd\u003eACS-B2021SD, ACU-B2021SD, ACT-B2021SD, ACC-B2022SD, RIV-B2022SD, RAC-B2022SD\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\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e2-Series\u003c\/td\u003e\n\u003ctd\u003eG42 220i, 230i\u003c\/td\u003e\n\u003ctd\u003e2021 on\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e2-Series\u003c\/td\u003e\n\u003ctd\u003eG42 218i, M240i\u003c\/td\u003e\n\u003ctd\u003e2022 on\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e3-Series\u003c\/td\u003e\n\u003ctd\u003eG20 318i, 320d Mild Hybrid, 320i, 330e, 330i, M340i\u003c\/td\u003e\n\u003ctd\u003e2018 on\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e3-Series\u003c\/td\u003e\n\u003ctd\u003eG21 318i, 320i, 330i\u003c\/td\u003e\n\u003ctd\u003e2018 on\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"AST Suspension","offers":[{"title":"5100 Street (non-inverted)","offer_id":57521008050556,"sku":"ACS-B2021SD","price":2568.0,"currency_code":"GBP","in_stock":true},{"title":"5100 Street (inverted)","offer_id":57521008083324,"sku":"ACU-B2021SD","price":2568.0,"currency_code":"GBP","in_stock":true},{"title":"5100 Street Performance","offer_id":57521008116092,"sku":"ACT-B2021SD","price":3216.0,"currency_code":"GBP","in_stock":true},{"title":"5100 Clubracing","offer_id":57521008148860,"sku":"ACC-B2022SD","price":3564.0,"currency_code":"GBP","in_stock":true},{"title":"5200 2-Way","offer_id":57521008181628,"sku":"RIV-B2022SD","price":5160.0,"currency_code":"GBP","in_stock":true},{"title":"5300 3-Way","offer_id":57521008214396,"sku":"RAC-B2022SD","price":5472.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/9208\/4867\/files\/ast-suspension-ast-bmw-g20-g42-ast-coilovers-for-bmw-3-series-g20-g21-2-series-g42-rwd-1.jpg?v=1790777744","url":"https:\/\/fdracing.co.uk\/products\/ast-coilovers-for-bmw-3-series-g20-g21-2-series-g42-rwd","provider":"FD Racing","version":"1.0","type":"link"}