2007-2021 Tundra 2nd Gen "MUIR" Lift Leaf Springs Archive Explorer Series
2007-2021 Tundra 2nd Gen "MUIR" Lift Leaf Springs Archive Explorer Series
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"MUIR" MD/HD adjustable leaf packs for the SECOND 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 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.
Product Fitment Notes
Product Fitment Notes
| 2007-2021 Tundra DC/CM 4x4 | Archive Muir Packs | |
| Pack w/ Added Rear Weight | Estimated Lift Amnt | Top-axle-Tube-to-Frame-Bot |
| Stock 3/1 - 0lbs | 0 | 9.25 |
| Archive 6/1 MD - 0lbs | 2.5 | 11.75 |
| Archive 6/1 MD - 750lbs | 1.5 | 10.75 |
| Archive 7/1 HD - 0lbs (Not rec.) | 3.5 | 12.75 |
| Archive 7/1 HD - 500lbs | 2.5 | 11.75 |
| Archive 7/1 HD - 1250lbs (3700) | 2.0 | 11.25 |
| Archive XD - 1250lbs | TBD | TBD |
| Archive XD - 2500lbs (5000) | 2.5 | 11.75 |
Shipping
Shipping
In stock items will ship in 24/48 hours during Monday - Friday business hours.
USA Shipping Flat Rate Lower 48: $150
Canada Shipping Flat Rate: $250
*Certain province will incur additional fee that will be confirmed via email.
I installed a set of these on my '21 Tundra DC that hauls daily and tows weekly. It completely transformed the truck's ride! It is unbelievably smooth, while retaining plenty of load and towing capacity. The pogo stick feel from the back end is completely gone. Between the two 2nd Gen Tundras that I own, I've installed a dozen shock setups from 5100's to Eibach 2.0 to MRR's to DirtKing 2.5 DSCs, as well as half dozen spring configurations; this has made the most noticeable and BEST improvement of virtually all those changes. I cannot believe how smooth and planted the vehicle is now!.
I left all springs installed (the bottom arched spring can be removed for less height/softer ride) and with a 3700 lb scale-verified rear axle weight, I got roughly 1.75" of lift. The fit and finish of the springs is the best I've seen of any spring I've installed. Installation was straightforward and relatively painless. The springs come with new polyurethane bushings and plenty of grease to install them. I also purchased Archive's U bolts for the install; the new spring are a true 2.5" wide spring vs the factory 2 3/8" wide springs, so the new u bolts are highly recommended.
The factory leaf pack looks like a joke compared to these. While the factory stack does it's job, I've felt for a long time that they are quite lacking for many reasons - poor ride comfort, pogo stick feeling when unloaded, wear out quickly, etc.. Not only does this leaf pack ride much better loaded and unloaded, it handles weight like it's no thing.
These leaves are extremely well built, well designed, and well suited to the tundra. I am extremely satisfied with them.
