[nonovurbizniz]

You need to know how to drive on a car with progressive springs...

they feel like they're all sloppy till you load them up...

they are apparently both progressive... but I've been in a couple cars with sportlines... and they were all bouncy and crappy...

I think the rates are just higher in the sportlines... the pro-kits just have more sedate rates on the lower end...

I had them (prokits) in my sentra and they kicked ass... my buddy with sportlines (bought them after driving in my car) was SOOO pissed when he found out I had the pro-kits not the sportlines...

He ordered them trying to get the same springs as mine... and he ended up getting the sportlines... they SUCKED... he hated them... I drove it once or twice and they weren't as nice riding as mine...