Product details
OVERVIEW
H&R Sport Springs are H&R's best-selling performance street spring and one of the first steps in suspension tuning. Replacing the factory springs on the rear-wheel-drive F33 4 Series Convertible lowers the center of gravity, reduces body roll and closes up the fender gap for a cleaner, more aggressive stance.
The progressive spring rate keeps the ride comfortable in normal driving and firms up as load increases, so the chassis stays composed when the road gets twisty. This kit lowers the front approximately 0.5" and the rear approximately 0.3". It is designed for cars without the factory sport suspension.
H&R springs are made from 54SiCr6 spring steel and shot-peened for long service life, so they will not settle or sag. Every spring is 100% tested before it leaves H&R's ISO9001-certified facility in Germany.
SPECS
- Approximate front lowering: 0.5"
- Approximate rear lowering: 0.3"
- For cars without factory sport suspension
- Progressive spring rate design
- Material: 54SiCr6 spring steel
- Shot-peened to increase service life
- Will not settle or sag
- 100% tested before leaving the production facility
- TÜV and ISO9001 certified quality assurance
- Manufactured in-house by H&R in Germany
PARTS INCLUDED
- H&R Sport Spring set — front and rear springs
- Complete kit as supplied by H&R Springs; see the installation instructions for the full bill of materials.
TECH RESOURCES
Additional Parts Required
- None. H&R Springs specifies no additional hardware for this spring kit.
- Four-wheel alignment after installation (installer-supplied service) — required any time ride height is changed.
- Professional installation — H&R specifies that its springs be installed by professional suspension mechanics only.
- Spring compressor (installer-supplied tool) — required to disassemble the factory struts on a spring-only kit.
Installation
- H&R Springs Technical & Installation Information (PDF) — installation requirements, ride-height measurement procedure, bumpstop trimming table and alignment notes.
- H&R Warranties & Claims (PDF) — official H&R warranty terms, coverage periods and claim procedure.
Notes
- Rear-wheel-drive Convertible (F33) without sport suspension only. For a lower drop, see the Super Sport Spring (28877-4).
- Confirm your exact model, drivetrain and suspension type with Speed Logic before ordering.
PART NUMBER
- 28878-4
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | 428i Convertible | F33 | N20 2.0L Turbo I4 | 2014–2016 |
| BMW | 430i Convertible | F33 | B46 2.0L Turbo I4 | 2017–2020 |
| BMW | 435i Convertible | F33 | N55 3.0L Turbo I6 | 2014–2016 |
| BMW | 440i Convertible | F33 | B58 3.0L Turbo I6 | 2017–2020 |