H&R Sport Spring Kit – BMW M235i / M240i (F22/F23)

OVERVIEW

H&R Sport Springs are the best-selling performance street spring for BMW, 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.

The progressive spring rates are increased 10 to 20 percent 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 percent, so the set will not settle or sag the way lesser coil springs do. Each spring is 100 percent tested before it leaves H&R's ISO9001-certified production facility in Germany, and the company holds both TÜV and ISO9001 quality certification.

SPECS

• Approx. front lowering: 1.0"
• Approx. rear lowering: 1.0"
• Progressive spring rates, increased 10–20% over stock
• Spring material: 54SiCr6 alloy spring steel
• 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 ISO9001-certified production facility in Germany
• Quality certification: TÜV and ISO9001
• Warranty: H&R covers springs for the duration of the original purchaser's ownership of the vehicle the springs are installed on

PARTS INCLUDED

• Complete H&R spring set 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

• Damper configuration check — confirm whether your car is fitted with factory Adaptive M Suspension / Electronic Damping Control. H&R releases separate part numbers for electronically damped cars, and this kit should only be fitted to the damper configuration H&R lists it against.
• Four-wheel alignment — H&R requires the wheel alignment to be checked and reset any time vehicle ride height is changed. Budget for a full four-wheel alignment immediately after installation.
• Professional installation — H&R states that its springs and suspensions should be installed by professional suspension mechanics only. Improper installation voids the H&R warranty.
• Bumpstop trimming (application dependent) — some H&R part numbers require the front and/or rear bumpstops to be trimmed to a specified length. Check this part number against the trim chart in the H&R technical information sheet linked below before you start.
• Wheel and tire clearance check — verify clearance at the fender, strut and inner arch at full lock and full compression, particularly with aftermarket wheel and tire packages.
• Installer-supplied tools: coil spring compressor for strut and shock disassembly, torque wrench, and the standard BMW suspension service tools.

Installation

• H&R Technical Information & Installation Guide (PDF) — H&R's technical sheet covering spring identification and markings, dead and tender coils, ride-height measurement, the bumpstop trimming 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 is the rear-wheel-drive kit. xDrive all-wheel-drive cars take a different H&R part number. Lowering figures are approximate and measured from stock ride height; confirm fitment for your exact model year with Speed Logic before ordering.

PART NUMBER

• 28891-2

VEHICLE APPLICATIONS