So my 4Runner is a Limited model (basically a normal 4Runner with a center diff inside the lockable 2 speed transfer case for full time 4 wheel drive , extra creature comforts, smart key, nav, auto dimming mirrors, 20” wheels, etc, and XREAS suspension. XREAS is pretty impressive, the dampeners are hydraulically linked corner to corner - right front to left rear and left front to right rear. The purpose of the system is the truck stays sports car flat around corners, like for real, it’s insane, it doesn’t seem like it should be possible. On road the system phenomenal. Off road it’s to firm and stiff of a ride, it takes a lot more force to get articulation out of it, with valving being on the slow side.
I do spend a lot of time off-road, not nessesarily rock crawling but lots of unpaved rugged rocky trails and mountain passes as well as washboard gravel and fire roads. In the fall I was driving down a trail to get to a trailhead to hike a 14er, rutted washboard gravel at 30 mph for about 20 minutes each way. The shocks got HOT, started to smell a bit and faded bad. After that they started slowly leaking. The problem with XREAS is that it’s a sealed non serviceable system, so it’s hugely expensive to replace it all.
Here’s my predicament. I am going to rip it all out and upgrade, I’m going to lift the rear 2 inches and the front 2.5 inches. I have the rear springs and extended travel front control arms (caster corrected for stability when lifted, beefy as fuck, and extended motion ball joints) sitting in the garage already, but I flip flop more than Hillary when it comes to choosing the rest of the suspension.
Option 1, Bilstein 6112/5160 combo. The combo is 60mm front pistons (although cutaways show that to be false, they are closer to 2” pistons), 46mm rear pistons, digressive valving, rears are remote reservoirs front are 2.5” bodied mono tube coil overs. A tried and true setup, the TRD Pro models basically come with this setup with a fixed 1.5” front lift and no rear lift. Total addition cost after the control arms and rear springs is roughly another $1,000
Option 2, King OEM kit. The go big or go home do it right once. Top of the line 2.5” remote reservoir dampers, fronts are coil overs. Extended travel front and rear, high end best of the best, fully serviceable and rebuildable. They come custom valved to my specific setup, accounting for added weight to the vehicle, how heavy the wheel and tire combo is, actual front and rear weight of the vehicle, type of ride I want, and the terrain I plan on using them in. Total addition cost after the control arms and rear springs is roughly another $2500 without compression adjusters or $3100 with compression adjusters.
I want to order soon, I plan to install in the spring after winter/ski season.