Deaver - Expedition Series Springs Leaf Pack (U402) - Toyota Tacoma (2005-2023)Note: Leaf packs include hardware and bushing kits. Deaver Progressive Series springs are high quality 9 leaf and 10 leaf units fabricated with high grade 5160 American Made steel. A higher leaf count spring allows the use of thinner leaf material that yields a more flexible progressive leaf stack, or pyramid, producing a much smoother spring rate curve throughout the complete suspension cycle. The even, linear compression rate curve of our