6 Inch Lift Kit | Diesel | Radius Arm | C/O V2 | Ford F-250/F-350 Super Duty (05-07)

Raise your first-generation Ford Super Duty with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift — an all-inclusive kit that enables up to 37-inch tires while preserving a factory-like ride.

Geometry-conscious engineering keeps suspension angles close to stock by using ultra-durable Radius Arms that bolt into factory mounts for a straightforward install and a near OEM feel. Each Radius Arm weighs 27 lbs and uses rubber bushings for vibration absorption.

Conversion highlights: replace the factory independent coil shock and coil setup with a 2.5-inch piston, nitrogen-charged Vertex Coilover. The Vertex Coilovers are monotube with an external reservoir for added oil capacity and damping sensitivity. The kit includes top-mounted reservoir brackets and coil-over mounts crafted from 1/4-inch steel for durability and rigidity. The 2.5-inch piston design delivers robust performance with 8-stage adjustability to tune ride and handling.

Performance and capacity: the 2.5-inch piston provides substantial rigidity, and Rough Country’s Vertex design offers 56% greater fluid capacity than the average reservoir shock, improving cooling and fade resistance under demanding driving conditions. Each kit is paired with a monotube shock for optimal damping control.

Installation: cutting and drilling are required, with an estimated 6–10 hours to complete the full transformation. The kit is designed for at-home installation when you have the right tools.

Warranty and fit: Limited Lifetime Replacement Warranty covers manufacturer defects from the date of purchase, giving peace of mind with ongoing use on Ford F-250/F-350 Super Duty trucks from 2005 to 2007.