Zone Nitro Series shock absorbers deliver stock-like ride quality with improved control using fully displaced, vehicle-specific valving for consistent compression and rebound performance. Each shock is nitrogen-charged at 50 PSI to ensure fast response and reduced aeration, and features a Fluon-banded piston for smooth operation and long service life. Shocks are sold individually and include required bushings and sleeves.

Shock Size & Mounting Breakdown

29.80" Extended / 17.60" Collapsed — EB1 / EB1
• 2017-2023 Ford F-250 / F-350 4WD
• Long-travel Nitro shock
• Upper Mount Type: Eyelet
• Lower Mount Type: Eyelet
• 2-3/8" shock body diameter
• Lift Height 0"

23.20" Extended / 14.15" Collapsed — EB1 / EB1 (Front 2.5")
• 1999-2004 Ford F-250 / F-350 4WD
• Shorter front shock configuration
• Upper Mount Type: Eyelet
• Lower Mount Type: Eyelet
• 2-3/8" shock body diameter
• Lift Height 2.5"

24.50" Extended / 14.50" Collapsed — S50 / EB2
• 2005-2016 Ford F-250 / F-350 4WD
• Mid-travel Nitro shock
• Upper Mount Type: Stem
• Lower Mount Type: Eyelet
• 2-3/8" shock body diameter
• Lift Height 4"

22.50" Extended / 13.50" Collapsed — S50 / EB2
• 2005-2023 Ford F-250 / F-350 4WD
• Compact shock configuration
• Upper Mount Type: Stem
• Lower Mount Type: Eyelet
• 2-3/8" shock body diameter
• Lift Height 2"