I've seen some confusion in various threads about which coil sizes fit the 5.7 vs 4.6 Tundras, so I did a little research... and I'm freaking out because I JUST ordered some 612s for my 5.7, with this information - notice the part #s don't go in order, it's 612, 614, 613:
612 med: For the 5.7 with 0-150lbs on the front
614 heavy: For 4.6 with 150lbs+ on the front, 10mm longer than 612 (some people put these on 5.7s for an even higher lift - I've mostly seen 3.5+ inches quoted by guys with 614s and no weight)
613 heavy: For 5.7 with 150+lbs on the front, 20mm longer than 612
Reference:
http://www.tundratalk.net/forums/tu...110331-another-rw-ome-setup-2.html#post841310 (guy in the thread actually called ARB for confirmation)
http://www.tundratalk.net/forums/tu...0993-ome-612-614-613-5-7-dc-2.html#post698854
3" OME front lift with shocks/coils - Toytec Lifts: Toyota Lift Kits: FJ Cruiser Lift Kits, Tacoma Lift Kits, Tundra Lift Kits, 4 Runner Lift Kits, Sequoia Lift Kits, Toyota Truck Lift Kits and look at the ordering options as a reference
...but the
ARB official site lists them as follows:
612: For 4.7 with no weight
614: For 5.7 with no additional weight
6
614: For 4.7 with bumper/winch weight
613: For 5.7 with bumper/winch weight
Here is their fitment guide... I'm thinking Toytec (unintentionally, certainly) led me astray on the proper part #... I'll probably see what I can do about switching the 612s out for 614s. Luckily they only arrived today and I won't be installing the kit for a few weeks.