Daystar has spent 15 years developing their "Durathane" progressive polyurethane technology to engineer polyurethane suspension coil spacer lifts, replacing the traditional aluminum or steel spacers that have been used over the years. Most late model suspension lifts have converted from leaf springs and torsion bars to coil spring suspension systems and coil-over shocks. Daystar Products has risen to meet the need for this new type of suspension lift to cater to the new demands of coil-sprung vehicles. Why is polyurethane better? Polyurethane is an elastomer, so it works just like a spring, giving you all of the strength and durability of metal, without destroying the ride quality. This is why Daystar has named their suspension systems "Comfort Ride." These lift kits not only lift the vehicle, but actually improve the handling characteristics, while preserving the stock factory ride quality.