Anyone knows diferences between the 2 references of H&R springs for ours rs? I want to buy them but I dont know what reference choose. 28997-1 http://www.ebay.co.uk/itm/H-R-Feder...565190?hash=item2c6b592486:g:B8MAAOSwUKxYgI9S 28997-2 http://www.ebay.co.uk/itm/H-R-Feder...-ab-08-Tieferlegung-Sportfedern-/192211435665
