Kelltrac Double Adjustable Rear Street - Strip Coilover Kit (2015 - 2026 Mustang) KTI-RCO15DA-SS

Kelltrac Double Adjustable Rear Street–Strip Coilover Kit (2015–2026 Mustang)

The Kelltrac Double Adjustable Rear Street–Strip Coilover Kit is the ideal suspension upgrade for S550 and S650 Mustang enthusiasts seeking improved stance, sharper handling, and serious performance capability—without sacrificing street comfort. Developed through over a year of testing across real road, strip, autocross, and no-prep environments, this kit delivers improved chassis response, a wider tuning window, increased wheel-rate capability, and an average weight reduction of 20 lbs.

Engineered around the powerful Viking Berserker double-adjustable shocks and custom Landrum springs, this Street–Strip Series setup provides precise compression and rebound control, enhanced traction, and optimized suspension dynamics for both daily driving and competition use. With billet mounts, reinforced hardware, spherical bearings, and ride-height adjustability, this kit instantly transforms the rear suspension of your Mustang.

• Perfect for street driving, drag racing, autocross, track days, and no-prep racing

• Saves approximately 20 lbs while improving traction and handling

• Viking Berserker shocks deliver aggressive performance valving

• Fully adjustable ride height and damping for tuning your setup

• Includes billet mounts, sway bar relocation kit, and reinforced hardware

• Provides dramatically improved stability, responsiveness, and rear grip

Included Components

• Billet upper coilover shock mounts

• Zinc-coated high-strength shock mount hardware

• Chassis reinforcement backing plates

• Premium drill bit for shock-mount installation

• Viking Berserker double-adjustable coilover shocks

• Custom 2.25" Landrum coilover springs

• Polyurethane bumpstops (pre-installed)

• Zinc-coated lower offset shock T-bars

• Heavy-duty lower shock mounting hardware

• Coilover spanner wrenches

• Rear sway bar relocation brackets

Key Features

• Designed for STREET, STRIP, TRACK & AUTOCROSS use

• Viking Berserker valving engineered for aggressive performance

• CNC-machined lightweight components built for competition

• Fully adjustable compression & rebound damping

• Ride-height adjustable for stance and geometry tuning

• Spherical-bearing mounts for accurate suspension control

• Precision-fit design for consistent alignment and durability

Performance Benefits

• Significant weight reduction for improved suspension response

• Adjustable wheel-rate capability for tuning traction and handling

• Enhanced stability during launches, cornering, and braking

• Wide adjustability ensures excellent performance on any surface

• Quick and simple installation—typically 1 hour

• Noticeably improved ride quality and control

Notes

• May increase NVH (noise, vibration, harshness)

• Not intended for towing or off-road use

• Check line/spring clearance—minor tab adjustments may be needed

• Designed around 20x11 & 17x10 wheels with 27x11–28x11 tires; larger setups may require spacing or modification

Vehicle Fitment

• 2015 Ford Mustang (S550)
• 2016 Ford Mustang (S550)
• 2017 Ford Mustang (S550)
• 2018 Ford Mustang (S550)
• 2019 Ford Mustang (S550)
• 2020 Ford Mustang (S550)
• 2021 Ford Mustang (S550)
• 2022 Ford Mustang (S550)
• 2023 Ford Mustang (S550)
• 2024 Ford Mustang (S650)
• 2025 Ford Mustang (S650)
• 2026 Ford Mustang (S650)

CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov