[HP Autosport]

Swift made Sport Springs Spec-R is made for true track racing enthusiasts that wants to take their vehicle to the next level.
Sport Springs Spec-R is engineered with 2 main characteristics.

1 Redesign lowering ride height to maximize the suspension performance allowing the vehicle to fully absorb road condition for maximum traction.

2 Increase in spring rate to further enhance cornering speed through entry & exit. The increase in spring rate is based on the vehicle factory stock valving settings. Sport Springs Spec-R is increase to the optimal rate that the stock shocks can handle. Higher performance shocks are not required, but recommended.

Spec R springs are wound with the same engineering as our sports springs. With the exception of stiffer rates and slight change in ride height; you can expect the same characteristics as our sports springs.



H5S.TW

Motorsport's most advanced spring material


Swift made a name for itself on the tracks of Asia, Europe, and U.S. by defying all accepted concepts and speculations about the future, if any, in coil spring science.
When many other company were looking at expensive and brittle titanium composites to create the next evolution of springs, Swift was looking at reinventing the entire science of coil spring dynamics. Swift saw that most others are using the old regular silicone chrome material, which was not strong enough. It used a heat tempering method that damaged the strength of the material that requiring more coils, in turn, more weight.
The material was also suffering from a short life span. With springs like this leading the industries, Swift saw room for improvement.

Swift's R & D team created material, called H5S.TW, which is stronger then regular silicone chrome material. Because of this material, we could make the spring wire thinner, and could wind the springs with fewer coils, which greatly decreased weight while dramatically increasing available stroke.

335i lowering:

1" in the front and 0.8" in the rear (from non-sport).

Spring rates:

-4kg/mm or 223 lb/in in the front

-11kg/mm or 615 lb/in in the rear


These should work on your 328i, 330i and 335D as well, but the lowering will be slightly different.

[blk 335i]

Nice! can't wait to try!

[cdgatti]

Wow even the mfg doesn't know what they are talking about. Conventional spring material is silicon chrome NOT silicone chrome.

[HP Autosport]

Originally Posted by cdgatti

Wow even the mfg doesn't know what they are talking about. Conventional spring material is silicon chrome NOT silicone chrome.

That is just a light spelling error on Swift's part.