Frustrated by trailer sway or uneven weight distribution when towing your fifth-wheel RV? Standard pin boxes often struggle with heavy loads, leading to dangerous fishtailing and premature wear. Curt’s Helux Coil-Spring Gooseneck Pin Box solves this with a patented coil-spring system that actively compensates for road imperfections while maintaining precise articulation—no more white-knuckle towing.

Features

• 20,000 lbs capacity – Engineered for heavy fifth-wheel trailers and toy haulers
• 3,900 lbs pin weight rating – Distributes load evenly for safer towing
• Coil-spring shock absorption – Reduces jarring impacts by 40% vs. rigid designs
• Greasable pivot points – Extends service life with easy maintenance
• Dual-latch security system – Prevents accidental uncoupling during transport
• Fits standard gooseneck couplers – No adapter needed for most trucks

Unlike traditional pin boxes that transfer every bump directly to your truck, the Helux’s coil springs act like a suspension system for your trailer. This means less fatigue for you and your vehicle, plus reduced stress on your RV’s frame. The result? Smoother rides on rough roads and confident handling in crosswinds.

Curt designed this pin box specifically for RVers who demand professional-grade equipment. The hardened steel construction resists corrosion from road salt, while the precision-machined kingpin ensures consistent performance trip after trip. It’s the upgrade your heavy-duty fifth-wheel deserves.

Tech Specs

• Brand: Curt™
• Model: Helux Coil-Spring Gooseneck
• Pin Weight Capacity: 3,900 lbs
• Gross Trailer Weight: 20,000 lbs
• Material: High-tensile steel with zinc plating
• Weight: 0 lbs (see manufacturer specs for actual weight)
• SKU: 2024044577

What's Included

• Curt Helux Coil-Spring Gooseneck Pin Box (fully assembled)
• Installation hardware kit
• Owner’s manual with torque specifications