LONESTAR RACING - STEERING STEM +2+0 with 7/8 CLAMP. All Steering Stems are made from 4130 Chromoly Steel that offers superior strength over the OEM mild steel unit. They also feature the Anti-Vibration clamp kit that helps reduce rider fatigue. ATV Galaxy is an authorized Lonestar Racing dealer located in Irvine California. Listing and template services provided by inkFrog.