Product OverviewQA1 COK113 Coilover conversion kit includes the necessary hardware to mount a 2.5" I.D. coil spring onto any of the QA1 Proma Star Series Aluminum struts. Kit includes enough components for one individual strut.Fitment NotesKit will fit on QA1 Proma Star struts, Hx01, Hx03, Hx05, Hx06Spanner wrenches T114W or T115W are compatible and recommended for ride height adjustment.