SWIFT SPRINGS Z65-178-090 Swift Springs Z65-178-090 Coil-Over Spring, 9 kgf/mm Rate, Copper Powder Coat

The Swift Springs Z65-178-090 coil-over spring is designed for performance suspension systems that require consistent spring behavior, dependable support, and precise response. Manufactured from high-quality steel, this spring delivers a firm 9 kgf/mm rate, equivalent to approximately 504 lb/in, helping suspension builders fine-tune vehicle balance, ride control, and handling characteristics. It is supplied as an individual spring for use with compatible coil-over hardware.
The coil-over design is intended for applications where spring rate selection and suspension adjustability are important. Swift Springs is recognized for producing performance-oriented springs with carefully controlled manufacturing processes, helping provide predictable characteristics across demanding driving conditions. The Z65-178-090 part number identifies this specific spring configuration, making it easier to match with a suspension setup, replacement requirement, or performance upgrade plan.
A durable copper powder-coat finish helps protect the steel surface while providing a distinctive appearance suitable for race, track, and custom performance builds. Before installation, confirm compatibility with the coil-over body, spring seats, retainers, and intended vehicle setup. Proper spring selection should account for vehicle weight, corner weighting, suspension travel, damper compatibility, and the desired handling characteristics. Professional installation and suspension tuning are recommended to help ensure safe operation and reliable performance. This Swift Springs coil-over spring combines a performance-focused rate, durable construction, and a finish designed to support long-term use in compatible suspension applications.

Features:

• Brand: Swift Springs

• Part Number: Z65-178-090

• Spring Type: Coil-over suspension spring

• Spring Rate: 9 kgf/mm, equivalent to approximately 504 lb/in

• Material: Steel construction for performance suspension applications

• Finish: Copper powder coat for added surface protection and a distinctive appearance

• Quantity: Supplied individually

• Application: Designed for use with compatible coil-over suspension hardware