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Not all springs are made equal, and Swift Springs has invested years of expertise and research into perfecting the art of spring manufacturing. The result of their dedication is the innovative "HS5.TW" proprietary steel alloy, which sets a new standard in the world of springs. Swift Springs has successfully achieved several crucial objectives with this material, including:
Founded in 1997, Swift Springs has built an impressive track record, catering to diverse applications ranging from oval track and dirt racing to the needs of enthusiastic street drivers. With a wealth of experience and a history of collaboration with world-class race teams and drivers, Swift Springs ensures they have the perfect spring to meet any demand.
Swift Springs understands that not all springs are created equal. While many springs may share similar dimensions and spring rates, the manufacturing process and materials used are pivotal to their performance. Drawing upon years of experience and extensive research, Swift Springs has refined the spring manufacturing process to perfection. In their relentless pursuit of excellence, Swift Springs developed a proprietary steel alloy known as "HS5.TW." This material accomplishes the primary objectives Swift had in mind:
Since its establishment in 1997, Swift Springs has taken on a diverse array of tasks and applications, ranging from oval track and dirt racing to enthusiastic street driving. They have accumulated invaluable experience working with world-class race teams and drivers from around the globe. Given the varied demands they've encountered over the years, you can have full confidence in Swift Springs to deliver the perfect spring solution for any requirement.
For BMW enthusiasts seeking enhanced performance and handling, the BWM F80 M3 Swift Springs - 1"F 0.4"R are the ideal choice. Engineered to precise specifications, these Swift Springs offer improved agility and responsiveness on the road or track. With a front drop of 1 inch and a rear drop of 0.4 inches, they provide a perfect balance of comfort and sportiness.
Upgrade your BMW F80 M3 with the BWM F80 M3 Swift Springs and experience a new level of driving performance.
DIRECT REPLACEMENT
LIFETIME WARRANTY!
BUY A PAIR FOR THE PRICE OF FACTORY SINGLE!
The rear springs on the 1999-2005 E46 323i 325i 328i and 330i models have a chronic broken spring problem. If it hasn't happened to you yet it will. Springs are nothing more than exposed steel and they rust easily. After a while a section of the spring actually breaks off.
A broken spring is very dangerous - the spring is no longer mounted correctly in the suspension and it cannot support the weight of the car, especially when cornering. The ride also suffers as the suspension is no longer able to absorb the bumps and impacts from the road. Aside from a visual inspection of the spring itself you might notice a clunking sound or banging noise coming from the front or rear. An inspection of the noise should also include other related items in the suspension: bushings, ball joints, links, mounts, etc. We also recommend replacing the rubber spring pads on the top and bottom of the spring because they lose their shape over time. Check if your car has 5mm or 15mm thick pads.
The factory BMW springs sell for $140+ each. We sold and replaced enough while working in New England that we were able to get a strong grasp of the issue and come up with our own springs that are an improvement over the factory springs in every way. These springs are made in Germany using high grade spring steel that is then shot-peened for longer life and powder-coated for protection. These are the same height as the stock replacement BMW springs which makes them a direct replacement.
Sold only as a pair.
This item fits the following BMWs:
1999-2005 E46 BMW 323i 325i 328i 330i - Sedan
KW H.A.S. Coilover Kit - BMW F12 F13 M6 offers precise height adjustment while preserving the factory electronic damping control system. This kit replaces the factory spring perches with KW's threaded height-adjustable perches, allowing for lowering of .2" to 1.2" in the front and .4" to 1.2" in the rear. It includes progressive rate lowering springs, shortened bump stops, and new dust boots to protect the original BMW shocks.