Rear supension Upgrades?

I have a 5 lug base model that i want to lower 4" in the back but make the suspension stiffer too. Would a sway bar help? or maybe new leafs.

 

I was reading someone got some composite leafs from Tundra Racing, might be worth researching but street trucks aren't my expertise.

 

Rear sway bar will definitely help the handling.

 

My recommendation would be 3 inch blocks with the 4x4 leaf spring. The leaf spring is thicker than the 2wd and consequently gives you some drop. That's what I'm running currently. Also worth noting that you will need a C-notch going that low. I'm autocrossing the truck and it's doing great with that setup.

 

For the sway bar I think I may need shorter end links where it connects to the frame. Where could I find an xbrace? Toyota dealership maybe?

 

That would have me about 4"-5" lower probably?

 

It will lower your truck about 4 inches.

 

That's good because I'm currently sitting about an inch or so higher in the back. 6 lug leafs would be great for off-road...

 

I bought the SOS rear sway bar kit for my 2014 4x2. The drop links were way too long and hit the tailpipe. I ended putting on OEM rear drop links from the X-Runner and everything lined up just fine. I also used to OEM drop link mounting brackets and they lined up with the holes already in the frame. Drilling out a rivet on each side to get access to one of the holes was a real pain and took a long time; it was the worst part of the project