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

full bolt on car during a 3rd gear pull which is why the VRSF HD is THE best option for your N55

N47 & N55 BMWs:

It’s not uncommon to see intake temperatures drop at the end of a 3rd gear pull due to the Competition HD’s larger overall surface area

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