Product details
OVERVIEW
H&R Sport Springs are the best-selling performance street springs for BMW, and replacing the factory springs is one of the first and most effective steps in suspension tuning. On the E85 Z4 M Roadster and E86 Z4 M Coupe they lower the car roughly an inch at both axles, which drops the center of gravity, reduces body roll and tightens up the fender gap for a more aggressive but still driveway-friendly stance.
The progressive spring rates are increased 10–20% over stock. They stay compliant during normal driving and stiffen as they compress, so the chassis stays composed when the road gets twisty without punishing the car on rough surfaces.
H&R springs are crafted from a special 54SiCr6 spring steel and shot-peened to increase their life by more than 200%, so they will not settle or sag. All production is completed by H&R in-house, and every spring is 100% tested before leaving the ISO9001-certified production facility in Germany.
SPECS
- Approximate front lowering: 1.0"
- Approximate rear lowering: 1.0"
- Progressive spring rate, increased 10–20% over stock
- Crafted from special 54SiCr6 spring steel
- Shot-peened to increase spring life by more than 200%
- Will not settle or sag
- All production completed in-house in Germany; each spring 100% tested
- Built to TÜV and ISO9001 quality assurance standards
PARTS INCLUDED
- Complete H&R Sport Spring kit as supplied by H&R Springs — front and rear springs. See the installation instructions for the full bill of materials.
TECH RESOURCES
Additional Parts Required
- None. H&R specifies no additional hardware for this spring kit.
- Four-wheel alignment after installation — H&R states that alignment must be checked after any suspension ride height modification.
- Professional installation — H&R states that its springs and suspensions should be installed by professional suspension mechanics only.
- A spring compressor and standard strut service tools, supplied by the installer, are required to disassemble the factory struts on this spring-only kit.
- Optional but recommended: dampers in good serviceable condition. Worn factory shocks limit the benefit of new springs.
Installation
- H&R Technical Information & Installation Guide (PDF) — spring markings (F/VA front, R/HA rear), ride height measurement, bumpstop trimming table, alignment requirements.
- H&R installation FAQ (hrsprings.com) — spring orientation, progressive rate springs, ride height measurement and post-installation alignment.
- Follow the factory service manual procedure for spring replacement on the E85/E86 chassis.
PART NUMBER
- 29119-1
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | Z4 M Roadster | E85 | S54 3.2L I6 | 2006–2008 |
| BMW | Z4 M Coupe | E86 | S54 3.2L I6 | 2006–2008 |