We are cutting a limited run of 4130 Chromoly 2-seat Ibex chassis kits for some Ultra-4 racer builds. Many of the tubes will be changed from .120 DOM tubing to .095 Chromoly. Main cage tubes and tubes likely to be impacted by rocks will remain .120 wall. Expect a total chassis weight reduction of 100 lbs. Contact us now for pricing pre-order specials.