IronBox BMW E36 / E46 / E83 / Z4 Adjustable Rear Lower Control Arms — Street Version

The IronBox Street Version adjustable rear lower control arms replace the limited-range factory arms and allow the rear suspension geometry to be correctly set on lowered, drift, track and performance street BMW builds
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Main features

• Adjustable rear camber geometry — allows negative, neutral or positive rear wheel angles to be configured according to the vehicle setup
• Wide adjustment range — provides approximately ±30 mm of arm-length adjustment, corresponding to up to approximately ±7° depending on the vehicle geometry
• Reinforced steel construction — designed to withstand the increased loads produced during drifting and performance driving
• Street-oriented bushing configuration — uses a standard serviceable silentblock format instead of a completely solid or spherical inner joint
• Reduced maintenance complexity — the standard-type bushing configuration makes worn components easier to replace
• Suitable for lowered vehicles — allows excessive negative camber created by reduced ride height to be corrected
• Protected adjustment components — adjusters, lock nuts and spacer sleeves receive a BLACKNITRIDE anticorrosion treatment
• Powder-coated steel arms — provide corrosion protection and a clean finished appearance
• Designed and manufactured in Ukraine by IronBox

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Compatibility

• BMW 3 Series E36 — excluding E36 Compact and 318ti
• BMW 3 Series E46
• BMW X3 E83
• BMW Z4 — exact chassis and suspension configuration must be confirmed before ordering

Not compatible with BMW E36 Compact rear suspension

Compatibility with M models and modified rear suspension configurations must be confirmed before ordering

Designed for the rear axle only

The selected arm length and final wheel geometry must be determined through a professional wheel alignment
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Kit includes

• Adjustable rear lower control arms — 2 pcs

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Important installation information

The original suspension mounting points and surrounding chassis areas must be inspected before installation

Both arms must be adjusted symmetrically before the initial wheel alignment

Sufficient thread engagement must be maintained throughout the complete adjustment range

All adjusters and lock nuts must be securely tightened after the final alignment

A complete four-wheel alignment is required after installation or adjustment

When conventional rubber silentblocks are used, final bushing tightening must be completed with the suspension at normal ride height

Installation and alignment must be completed by a qualified specialist