I ditched X-Reas few years back for Bilstein 5100 and couldn't be happier. I was afraid that body roll an nose dive would be bad after the switch but was pleasantly surprised how well that setup works with stock springs. I'd say go for it. If money is an issue - get Bilstein 5100, if not - Fox 2.0 is another even more awesome option.

My ‘07 had the xreas system and it got soft. I sourced 4 new bilsteins off ebay about $70 each and couldnt be happier. Firm ride, limited nose dive, great for towing my boat. I also replace the bushings in my panhard bar to polyurethane to get better control over the loose tail end. There is a lot of slop in the rear end over bumps and this helps.

X-REAS is amazing when its functioning properly.

Its god awful once the shocks fail and lose pressure since you're basically riding on springs.

OP to answer your question I just reused my stock springs when I replaced the XREAS with Bilstein 5100 @ 200k.

I'm at 250k now and I think the ride is perfect. Bilstein 5100 on stock springs stiffened the ride significantly without being too harsh.

I do still miss XREAS though. I test drove two 4Runners before I bought the sport, one with XREAS and one SR5. I actually hated how "disconnected" the XREAS felt at first but still ended up buying the sport since it was in better condition. I quickly became used to XREAS and once I did I appreciated how smoothly it cornered and handled.

Literally swapped mine this weekend.

Do not reuse the springs. As someone else said earlier on, my 2.5 inch lift was more like a 4 inch lift because the springs were so compressed.

I went dobinson springs/shocks with JBA UCA's, whiteline bushings, and 555 ball joints. I already had poly bushings on the rear.

It made an insane difference in how it rides. I think my X-REAS was failing even before it started to show with the tire wear. It's firm, connected, and feels great.

Words of wisdom:

-Spend the money and buy lower control arms. I have a press and a lift and doing this lower control arm bushings suck.

- I can almost promise you your springs are saggy. Get new springs, even if it's stock height.

- just go ahead and get new camber bolts too. I got lucky and went 3 for 4. But that 4th one was seized up and was a real pain in the ass to get cut.

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