I too have the foam seat padding, instead of the springs. I purchased mine off ebay and unclear why they were so inexpensive. Mine actually have "incorrect" piping, unless my car was a little older. What I really like about the foam, was that I was able to remove the bottom seat cover and cut about six inches off, and re-staple the cover back on. The seat lowering is hardly noticeable by a casual observer -unless that observer actually sits in the car. Before the lowering, the top of my head was above the windshield, making it difficult to wear a cap -and impossible to drive with the top up. Lowering a seat with the springs would be much more difficult, and probably less comfortable. After lowering, I find the seat to still be comfortable. -Sure, I've sat in more comfortable seats, but I have driven this car 5,800 miles in 10 days. I can't say I was ready for more, but I enjoyed it.