NOTE: This thread updates and continues the 4-link discussions from Brian's earlier thread:
The other thread is stale and old with outdated pics and the 4-link doesn't look anything like the pictures in it. This is the new thread.
There is currently one 4-link kit installed and it's on voodootrip's 04 V6 s-runner with TRD supercharger. The kit was tested immediately with a dump of the clutch and the result was about a 100 yard burnout through 2nd gear with zero wheel hop as expected but the truck is so light in back for the power it's putting down he just couldn't hook up as well as we had hoped, even with 275's on all 4 corners. Removing the spare tire and replacing it with a fuel cell would help, and I do have plans on making a bolt in cradle to hold a cell in this area as an option for this kit. Another option is a rear X brace for the very end of the frame. These will not come with the kit, but would as optional items if someone wanted this.
I'm in the process of putting the 2nd kit together and it will be shipped off. It's a 99% bolt on kit with the exception of 4 tabs that will get welded to the axle housing. Common with aftermarket 4-link kits. My friend's Camaro kit is like that and his kit pales in comaprison to this kit. Everything is smaller and weaker than the parts in this one and I've been with him when he put all 400hp to the rearend and it all held up, reasuring me this kit is overkill for these trucks.
This is a true racing kit with rod ends on both ends of the forward facing links. The gas tank doesn't need to be relocated. Instead of waiting until this 2nd kit is done to post prices and info, I've decided to keep people up to speed and show them the parts and the prices.
(2) bolt in cross members
1-3/4" x 120 4130 chromoly with special ends to bolt them to the frame. The coil over one uses factory holes to locate everything, and some holes need to be drilled.
The other one replaces the OEM rear gas tank one and has 4 tabs for the upper links, uses the factory holes, and has a special little piece to attach the gas tank strap with the factory pin.
(2) bolt on u-bolt plates
3 different holes to raise or lower the rear and re uses the stock u-bolts, or you can purchase my 1/2" grade 5 or 9/16" grade ones. They will be stock length. These u-bolt plates are what the rear of the lower links bolt to also.
(4) 1-1/2" x .250 DOM link bars
Use QA1 tube adapters made for the 250 wall material, and use 3 piece precision rod ends.
The small stuff:
(16) rod end spacers
to go between the rod ends and tabs, rod ends and u-bolt plates, and rod ends and front leaf hangers the lower bars bolt into.
(1) bolt on exhaust hanger
bolts on to the link cross member near the right frame rail and is right where the stock one was.
(1) bolt on bracket for gas tank strap
Mounting Hardware: (the nuts, bolts & washers)
gold coated fine thread grade 8, SAE washers & top lock nuts
cross members to frame
Link bars & shocks