H&R Street Performance Coilover – BMW M3 Sedan / Coupe (E90/E92, S65)

OVERVIEW

The H&R Street Performance Coil Over pairs a custom-valved shock with a precision-engineered progressive-rate H&R spring, so damping and spring rate are matched to each other rather than mixed and matched. The result is the balance of handling and ride comfort H&R aims at for everything from a daily driver to a seriously tuned street car.

Every damper uses a fully threaded shock body, so ride height is set continuously rather than in fixed steps and can be fine-tuned corner by corner. Across the Street Performance line H&R quotes an average height-adjustable range of 1.0 to 2.5 inches. The dampers are mono-tube gas units built from premium materials for a lower center of gravity and improved control.

On the E90 / E92 M3 the kit gives a usable adjustment window of roughly one to one-and-a-half inches at the front and up to about an inch and a third at the rear, so the car can be set anywhere from a mild street drop to a properly low stance.

SPECS

• Approx. front lowering range: 1.0" – 1.6"
• Approx. rear lowering range: 0.3" – 1.3"
• Damper: custom-valved mono-tube gas shock, matched to a progressive-rate H&R spring
• Ride height: fully threaded shock body, continuously adjustable
• Height-adjustable range across the Street Performance line: approx. 1.0" – 2.5" on average
• Springs manufactured in-house by H&R from 54SiCr6 alloy spring steel and shot-peened
• Warranty: 2 years on H&R Street Performance Coil Overs

PARTS INCLUDED

• Complete H&R Street Performance Coil Over kit 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 coil over kit. H&R does not publish a separate per-application installation PDF for this part.

Notes

• Lowering figures are approximate and are measured from stock ride height. Confirm fitment and damper configuration for your exact model year with Speed Logic before ordering.

PART NUMBER

• 50492

VEHICLE APPLICATIONS