I've been researching on suspension for my car and looking for a 60/40 kit for my cabrio. I see some people running the KW 60/40 on their 325is but not on a cabrio. Tunnershop.com sells a 55/40 kit for my 4 banger and wondering if I get a 60/40 for a 318 coupe would it matter? I think the weight difference is sigificant between the cabrio and the coupes? What else would u run with this set up to give you a bit more lowering? Spring caps? Anyone heard of Supersport Spring caps?