H&R Street Performance Coilovers – BMW 3-Series (E90)

OVERVIEW

The H&R Street Performance Coil Over is H&R's everyday-driveable adjustable suspension for the E90 3-Series. Spring rates and shock valving are chosen for street use first, so the car gains a lower centre of gravity, less body roll and better weight balance without becoming punishing on real roads.

The system uses fully threaded, custom-valved shock bodies with progressive-rate springs front and rear, letting you set ride height anywhere in the working range rather than accepting a single fixed drop. H&R lists an average adjustment range of roughly 1.0–2.5" for the Street Performance line.

Coil overs are 100% German made and carry TÜV and ISO certification, the same quality standard H&R applies across its spring and suspension programme.

SPECS

• Approx. front lowering range: 1.25" – 2.5"
• Approx. rear lowering range: 0.75" – 2.0"
• Fully threaded shock bodies for adjustable ride height
• Custom-valved dampers tuned for street performance
• Progressive-rate springs front and rear
• 100% German made
• TÜV approved and ISO-certified production

PARTS INCLUDED

• Fully threaded, custom-valved H&R shock bodies — front and rear
• Progressive-rate H&R springs — front and rear
• Complete coil over system as supplied by H&R Springs; see the installation instructions for the full bill of materials.

TECH RESOURCES

Additional Parts Required

• Four-wheel alignment after installation and after any ride-height change. H&R requires the wheel alignment to be checked any time ride height is adjusted.
• Professional installation. H&R states its springs and suspensions should be installed by professional suspension mechanics only.
• Set the coil overs to the highest setting in the working range on first install, verify all clearances, then lower to the desired height — particularly important with aftermarket wheels.
• H&R recommends applying Boeshield T-9 lubricant to the adjuster threads before and after adjustment to keep dirt out.
• If your car is fitted with EDC / adaptive dampers, confirm compatibility with Speed Logic before ordering.

Installation

• H&R Springs Technical Information Sheet (PDF) — official H&R installation, ride-height measurement, coil over adjustment, bumpstop trimming and alignment instructions.

Notes

• H&R also catalogs 29177-1 for the E91 Touring, E92 Coupe and E93 Convertible chassis. Confirm your exact chassis, engine and build date with Speed Logic before ordering.

PART NUMBER

• 29177-1

VEHICLE APPLICATIONS