"MUIR" MD/HD adjustable leaf packs for the 2007-2021 2nd Gen TUNDRA are designed by Archive for severe duty off road travel and built to travel from Alaska to Argentina!

Made in USA with 5160 steel, tip insert pads, full military wrap, diamond point ends, bolted spring clips, top quality US made poly bushings and sleeves included.

-7/1 design, that configuration gives you HD spring rate. 7th arched leaf removed gives you softer 6/1 MD rate and ~1" less lift. 

-MD is ideal for 0-750,  HD is ideal for 750-1500 lbs

-Stout main leaf fully supported end-to-end to endure all your shreddy sends

-See Fitment chart for estimated lift height per weight added to rear axle

-Can be used with stock or Archive lift shackles

MD/HD available now, XDs are in testing and coming soon!

Named after John Muir, known as a "Father of the National Parks", a Scottish-born American naturalist, author, and advocate for the preservation of wilderness in the US.