1981 Mack DM Series Valves & Valvetrain Parts
- Melling® - Valve SpringMack DM800SX 14.0L 1981, Valve Spring by Melling®. Street to circle track, OEM to drag race performance, Melling valve springs cover the market and your requirements. Standard, mid-range, heavy-duty and race ready applications are...Right for your vehicle and lifestyleMade from high-quality materials for ultimate durability$5.68