Stock Height Replacement: The 4600 is tuned for your vehicle – no matter whether you're working down a gravel road, towing a trailer, or taking the family out; you can expect a safer, more pleasurable driving experience, with less fatigue on those long hauls Monotube Design: 4600 nitrogen-infused 46mm monotube design with a floating dividing piston separating the gas and oil, provide consistent, fade-free performance; Durability you can trust on the road ahead Instant Reaction: You can be confident knowing that this patented digressive valving allows shock absorbers to instantly react to changing surface conditions, giving you a stable, controlled, and comfortable ride Direct Fit: Bolt on and head out. Whether you're headed to work or hitting the trails, B6 4600 shocks are always a direct-fit installation for 2005 - 2016 F250 F350 Super Duty 4WD. Less time in the garage, and more time to enjoy your ride; Does not fit cab & chassis models Fine-Tuned: Individually fine-tuned in the road test; Each shock absorber is rigorously tested for quality that meets or exceeds OE standards and is covered by a limited lifetime warranty B6 4600 shock absorbers are designed as a direct fit upgrade to OE shock absorbers on stock height light trucks and SUV’s. These shock absorbers feature a monotube design which provides consistent fade free performance. B6 4600 shock absorbers utilize a unique, velocity sensitive, digressive piston which reacts to changing road conditions. All B6 4600 shock absorbers are tuned for each specific application to ensure optimal performance is achieved. B6 4600 shock absorbers offer a significant improvement in ride quality, handling, and comfort. knows that you depend on your vehicle for many aspects in life, and they build a product that you can count on. When it comes to performance and dependability. Realizing the perfect driving behavior, building the perfect shock absorber – that is the motivation that drives. Every day. And they have been doing so for around 70 years. Vehicle Compatibility: Fits 2005 - 2016 F250 Super Duty & 2005 - 2016 F350 Super Duty 4WD. Does not fit cab & chassis models.