Progress Technology Coil Spring / Tie Rod Sleeve / Sway Bar Kit

Progress Technology: Precision-Engineered Coil Spring, Tie Rod Sleeve & Sway Bar Kits

When it comes to transforming a street car's handling without sacrificing daily drivability, few names carry the credibility of Progress Technology. Coil spring, tie rod sleeve, and sway bar kits sit at the very heart of what Progress Technology has built its reputation on — purpose-engineered suspension components that deliver measurable results on both the street and the track.

A Foundation of In-House Engineering

Progress Technology was founded in 1995 and has grown from a suspension parts distributor into a full-scale manufacturer with its own in-house engineering staff. The brand designs, prototypes, and tests every component under one roof in Anaheim, California, ensuring that coil springs, sway bars, and related hardware work together as a calibrated system rather than an assembly of mismatched parts. That depth of vertical integration — from concept to finished product — is reflected in the fit and performance of every kit.

What Sets Progress Sway Bar Kits Apart

Progress Technology's sway bars are cold-formed using precision CNC bending equipment, and laser-cut or machined ends are MIG-welded in place using precise fixtures for an exact fit. Each kit replaces smaller factory sway bars with larger-diameter alloy steel bars and swaps the soft OEM rubber bushings for durable polyurethane alternatives — a combination that dramatically tightens chassis response without introducing harsh noise or vibration. Many bars feature multiple adjustment holes, letting drivers dial in front-to-rear chassis balance to match their driving style or track conditions.

Front and rear sway bar combo kits — a popular choice among autocross and road-course enthusiasts — tackle the understeer that plagues many front-wheel-drive platforms by balancing roll stiffness across both axles. Whether you're running a Honda Civic, Mazda MX-5, Acura RSX, or a late-model truck or SUV, Progress Technology offers fitment-specific kits engineered for the geometry of each platform.

Sport Springs: Lowering with a Purpose

Progress Technology's Sport Springs are precision-tuned to lower ride height, reduce body roll, and sharpen vehicle response — and like all Progress products, they are proudly made in the USA and backed by a limited lifetime warranty. These springs are intended to complement Progress sway bars, and many enthusiasts install them together as a complete handling package. When paired, the springs reduce the center of gravity while the sway bars control the roll moment, resulting in a balanced, predictable chassis that holds its composure through corners.

Race-Proven, Street-Ready

Progress Technology's products have been validated at the highest levels of amateur and professional motorsport, including SCCA, IMSA, NASA, and Toyota Motorsports events. That race-proven pedigree translates directly to the bolt-on kits sold for street use — the same engineering philosophy and manufacturing standards apply whether the end destination is a weekend autocross or a daily commute. All products carry a limited lifetime warranty, underscoring the brand's confidence in their domestic manufacturing quality.

• CNC cold-formed alloy steel sway bars — larger diameter than OEM for reduced body roll
• Adjustable hole patterns on many bars for chassis tuning flexibility
• Polyurethane bushings included — quieter and more responsive than OEM rubber
• Sport Springs engineered to work in concert with sway bar kits
• Made in the USA in Anaheim, CA — backed by a limited lifetime warranty
• Vehicle-specific fitment across a wide range of domestic, Japanese, and European platforms

For drivers looking to raise their vehicle's handling game without a full coilover conversion, Progress Technology's coil spring, tie rod sleeve, and sway bar kits represent one of the most trusted and technically rigorous bolt-on solutions in the aftermarket. Explore the full lineup on the Progress Technology brand page.