They lower the car about 1.5" and they give you much more stability and less body roll in the corners. Here is a comparison shot. The factory spring is on the right.
H&R Sales Copy
For more than twenty years H&R Springs has established a proven heritage of unsurpassed industry respect and customer confidence. Built on the foundation principles of superior quality, true performance and reliable service, H&R is the unquestioned authority in the highly competitive spring market.
It all begins with top German craftsmanship. From durability tested, premium wire materials to specifically designed procedures which guarantee precision manufacturing, H&R provides a well-engineered, durable product that ensures a consistent and trouble-free driving experience.
In an extremely competitive market quality springs that last are a must. 100% of H&R Springs meet or exceed ISO 9001 standards: no other spring manufacturer can make this claim!