H&R Sport Spring Kit – BMW 3 Series & 4 Series (F30/F32, N20/B48/N55/B58/B46)

OVERVIEW

H&R Sport Springs are the best-selling performance street spring for the BMW F30 3 Series and F32 4 Series RWD range, and they are the usual first step in suspension tuning. Replacing the factory coils lowers the car's center of gravity and cuts body roll, which sharpens handling and chassis balance while giving the car an aggressive but still driveway-friendly stance. H&R fits this kit whether or not the car has factory sport suspension.

The progressive spring rates are increased roughly 10–20% over stock. That progression is what lets the kit stay comfortable and composed in normal driving and then firm up for proper body control when the road gets twisty.

H&R manufactures every spring in-house from a special 54SiCr6 spring steel and shot-peens it to increase service life by more than 200%, so the set will not settle or sag the way lesser coil springs do. Each spring is 100% tested before it leaves H&R's ISO 9001-certified production facility in Germany, and the company holds both TÜV and ISO 9001 quality certification.

SPECS

• Fits cars with or without factory sport suspension; lowering amount varies by suspension type
• Progressive spring rates, increased approximately 10–20% over stock
• Spring material: 54SiCr6 alloy spring steel, cold-wound
• Shot-peened to increase service life by more than 200%
• Will not settle or sag in service
• Every spring 100% tested before leaving H&R's ISO 9001-certified production facility in Germany
• Quality certification: TÜV and ISO 9001
• Warranty: H&R covers springs for the duration of the original purchaser's ownership of the vehicle the springs are installed on
• Rear-wheel-drive only — not for xDrive-equipped F30/F32 cars

PARTS INCLUDED

• Complete H&R spring set (4 springs) as supplied by H&R Special Springs.
• See the fitting instructions supplied in the box for the full bill of materials.

TECH RESOURCES

Additional Parts Required

• Confirm rear-wheel drive. This kit is for RWD F30/F32 cars only. xDrive versions require a different H&R part number.
• Confirm factory sport suspension. H&R lists this kit for cars with or without factory sport suspension, but final ride height differs between the two — confirm which your car has before ordering.
• Spring compressor. A spring-only kit requires the struts to be disassembled, which needs a proper coil-spring compressor. Installer-supplied.
• Four-wheel alignment. H&R requires the alignment to be checked and reset any time ride height is changed. Budget for this before ordering.
• Professional installation. H&R states its springs and suspensions should be installed by professional suspension mechanics only. Improper installation voids the H&R warranty.
• Optional: matched sport-valved dampers, since a lowered car holds up better on a damper valved for the shorter spring.

Installation

• H&R Technical Information & Installation Guide (PDF) — spring identification and markings, dead and tender coils, ride-height measurement, bump-stop trim chart by part number, and alignment requirements.
• H&R Warranties & Claims (PDF) — official H&R warranty terms, coverage periods and claim procedure.
• Vehicle-specific fitting instructions are supplied in the box with the spring set. H&R does not publish a separate per-application installation PDF for this part.

Notes

• This kit fits both the F30 3 Series sedan and the F32 4 Series coupe on the shared platform — confirmed against three independent vendor fitment charts (Turner Motorsport, ECS Tuning, Bimmerworld), all of which list both chassis under this single part number.
• Lowering figures are H&R factory approximations and vary with suspension type, options and starting ride height. Confirm exact fitment with Speed Logic before ordering.

PART NUMBER

• 28878-2 — H&R Sport Spring set, BMW F30/F32

VEHICLE APPLICATIONS