This is a set of Type-E Coilovers with Pillowball Upper Mounts for the E85 BMW Z4 M from high-end suspension specialist, Aragosta.
Aragosta’s Type-E series of dampers are designed with both spirited street driving and comfortable cruising in mind. The Type-E includes several of high tech features of their Type-S and Type-SS high performance coilovers, including low-friction, WPC-treated inverted struts, height-adjustable Rana springs, specially formulated synthetic damper fluid and Aragosta’s unique low friction seals. Additionally, the Type-E features 12-step rebound adjustment knobs (not available for some vehicles) on the bottom of each damper, as well as pillowball upper mounts (camber adjustable mounts available for some applications).
WPC is a Japanese micro-shot peening process that greatly smoothens and strengthens materials on a microscopic level. For more information on WPC, refer to the link below on MotoIQ.com: http://www.motoiq.com/MagazineArticles/ID/3152/WPC-is-Neat-Stuff.aspx
Spring and Height Adjustment Specs:
Front Spring Rate = 7kg/mm main spring with a 3kg/mm tender spring; Front initial drop of -25mm and an adjustment range of +10mm〜-10mm
Rear Spring Rate = 5kg/mm; Rear initial drop of -20mm and an adjustment range of +5mm〜-5mm
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