Awesome Service – See Our Ratings. Touring Tech Rear Air-Bag Tow Assist Kit. Touring Tech towing assist kit includes (2) 2500lb air springs with brackets, corrosion proof push to connect fittings, hardware, ΒΌ DOT approved air line and Schrader fill/release valve. Remove one leaf spring and inflate the system to restore load capacity. Provides up to 5000lbs of leveling capacity. To be used on vehicles with Rear Leaf Springs.