ROUGH COUNTRY | 6" Lift Kit | 17-22 Ford F-250 Super Duty / 17-22 Ford F-350 Super Duty | Select Kit Options

6" Lift Kit

Select the configuration below. Review the fitment notes and included components for your selected part number before ordering.

Available options

• R/A / No OVLD / C/O V2 — 55658
• OVLD / C/O Vertex — 55459
• OVLD / C/O V2 — 55458
• Radius Arm / No OVLD / C/O Vertex — 55859
• R/A / OVLDS / C/O V2 — 51258
• R/A / OVLDS / C/O Vertex — 51259
• Radius Arm / No OVLD / C/O V2 — 55858
• R/A / No OVLD / C/O Vertex — 55659

Important fitment notes

Models equipped with a 10-speed transmission must remove dial pin. Does NOT fit gas engine models. Does NOT fit manual shift transfer cases. Does NOT fit dually models. New fabricated lift block replaces the factory equipped lift block. Does NOT work on models equipped with Tremor Factory Trim Package.

R/A / No OVLD / C/O V2 — 55658

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

OVLD / C/O Vertex — 55459

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

OVLD / C/O V2 — 55458

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

Radius Arm / No OVLD / C/O Vertex — 55859

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

R/A / OVLDS / C/O V2 — 51258

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

R/A / OVLDS / C/O Vertex — 51259

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

Radius Arm / No OVLD / C/O V2 — 55858

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

R/A / No OVLD / C/O Vertex — 55659

Superior Ride Quality. Take your fourth-generation Ford Super Duty to new heights with Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift! This all-inclusive kit comes with everything you need for a total transformation of your truck. Run up to 37in tires while preserving the smooth, factory ride quality with this impressive upgrade. When changing a vehicle's suspension, the key to preserving ride quality is keeping the geometry of all suspension components as close to their factory angles as possible. Rough Country's new 6-inch Radius Arm Suspension Lift features a set of ultra-durable Radius Arms, precision fit to bolt right into the factory mounts for an easier install and a more factory-like angle. At 27lbs each, these beefy, upgraded Radius Arms dwarf stock equipment and feature durable durable rubber bushings for maximum vibration absorption. Rough Country’s 6" Radius Coilover Conversion Lift Kit features top-mounted reservoir brackets and coil-over mounts constructed from 1/4-inch steel. Utilizing this conversion kit you're removing the factory independent coil shock and coil set-up and replacing it with a massive 2.5in piston, nitrogen-charged, 8-stage adjustable Vertex Coilover. Rough Country’s Vertex Coilovers feature a monotube design with an external reservoir for increased oil capacity and damping sensitivity. When it comes to investing in a high-end kit, you’ll be pleased to find that Rough Country’s 2.5in piston design is beefier and offers an impressive 56% greater fluid capacity than the average reservoir shock. Each kit is paired with a monotube shock that provides optimal damping control. Installation. Requiring cutting and drilling to install, an estimated timeframe of 6-10 hours is recommended to complete this full installation. This full kit can be installed at home and can be completed efficiently and quickly! Limited Lifetime Replacement Warranty. Rough Country's 6-inch Radius Arm Coilover Conversion Suspension Lift Kit is backed with a limited lifetime replacement warranty towards manufacturer defects. As such, the product is protected from structural and workmanship damage after the date of purchase. With our industry-leading warranty give yourself peace of mind when using Rough Country's Suspension products!

Easy bolt-on installation. Increased ground clearance. Levels the front with the rear of the vehicle. Includes durable radius arms. Fabricated blocks are stronger and offer a longer lifespan than cast blocks. Specially designed anti-axle wrap rear blocks maintain stock ride quality while eliminating common lift block problem.

Installation instructions

• 55658: View manufacturer installation information
• 55459: View manufacturer installation information
• 55458: View manufacturer installation information
• 55859: View manufacturer installation information
• 51258: View manufacturer installation information
• 51259: View manufacturer installation information
• 55858: View manufacturer installation information
• 55659: View manufacturer installation information