The Timbren Bumpstops does cure the bottom out, heps is towing/loads and handling when you have the rear sway removed. You can use Timbren in Rear and the $10 (for 2) Autozone Bumpstops in front.

I put Timbren on a X 05 with a Daystar lift, the spacers in rear were right on and front fit perfect as well. MC