H&R 07-11 BMW 335i E9x non M Springs 135i All H&R springs are produced

All H&R springs are produced from a special 54SiCr6 spring steel

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N47 & N55 BMWs:

The VRSF chargepipe retains the OEM c-clip in order to provide a better seal over a conventional clamp/coupler design

High Density Bar & Plate Core

H&R 07-11 BMW 335i E9x non M Springs 135i All H&R springs are producedEvery spring produced by H&R comes from the H&R ISO 9001 certified engineering and manufacturing facility in Germany. All H&R springs are produced from a special 54SiCr6 spring steel, which has strength rated at 290,000 psi resulting in unrivaled tensile strength and resiliency. H&R Sport Springs offer the handling characteristics and aggressive appearance that youve been looking for, without the harsh ride characteristics of less advanced spring