Lowering the rear

[Dom]

Do these king of things work on the rear springs of our cars, or is it a better idea just to chop the coil?

http://cgi.ebay.co.uk/COIL-SPRING-CLAMPS-race-rally-autograss-hand-tools_W0QQitemZ220478798859QQcmdZViewItemQQptZUK_Hand_Tools_Equipment?hash=item33558f7c0b&_trksid=p3286.c0.m14#ht_500wt_866

[bis13]

these work its up to you really