Barrel Spring 12in x 2.5in x 350#

The Barrel Spring 12in x 2.5in x 350# from SWIFT SPRINGS is an essential suspension and chassis component designed for automotive enthusiasts undertaking serious vehicle modifications and performance tuning. This coil spring assembly delivers consistent load support and ride quality management, making it ideal for custom build projects where suspension geometry demands precision engineering. Whether you're upgrading a street machine, fabricating a specialized chassis, or fine-tuning a performance platform, this barrel spring provides the spring rate stability required for predictable handling and weight distribution across your vehicle's framework.

With a 350-pound spring rate and 2.5-inch barrel diameter, this 12-inch barrel spring is engineered to manage moderate to heavy loads while maintaining consistent compression characteristics through full suspension travel. The 350# rating indicates the force required to compress the spring one inch, a specification critical for matching your vehicle's weight distribution, center of gravity, and intended use case—whether that's daily driving comfort, autocross responsiveness, or dedicated track work. The barrel configuration ensures minimal bind and reliable performance across repeated cycles, with the compact 4.7-inch coil diameter optimizing packaging within tight suspension bays common in modified and custom vehicles.

Mechanics and fabricators benefit most from SWIFT SPRINGS' proven track record in suspension applications, particularly when paired with adjustable coilover systems, custom trailing arm geometries, or performance shock absorber packages. This barrel spring suits builders working with independent suspension designs, prototype chassis development, and applications where OEM spring rates prove incompatible with modified weight or ride height. Before installation, confirm spring seat specifications, verify clearance against suspension components and bodywork, and ensure your damper tuning complements the 350# rate for optimal handling balance and ride consistency. Professional installation is recommended to guarantee proper seating, correct preload adjustment, and safe operation under all driving conditions.