I see why Progress makes a spring specifically for the Si. These springs suck ass! I love the look of it, but the drive is just rediculous. I hit a slight dip or bump, and I get a "BAM"! everytime. I bottomed out really bad today. I'm taking these suckers off as soon as I can. Anyone know the spring rate for H&R? I really don't want to get the H&R if they aren't specifically made for the Si. I hear they are made for the EX.