IronBox BMW E8x / E9x Solid Rear Subframe Bushing Kit
$
225.00
$
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The IronBox BMW E8x / E9x Solid Rear Subframe Bushing Kit replaces the compliant OEM rubber-metal bushings and rigidly connects the rear subframe to the vehicle body ⠀ The solid duralumin construction eliminates unwanted movement in the original bushings and significantly increases the rigidity of the rear suspension assembly ⠀ Reducing rear subframe movement helps maintain more consistent suspension geometry during acceleration, braking, cornering, and rapid load changes ⠀ Main features ⠀
Solid rear subframe mounting — replaces the flexible OEM rubber-metal bushings with rigid duralumin components
Reduced subframe movement — minimizes unwanted movement between the rear subframe and vehicle body
More consistent suspension geometry — helps maintain camber and toe settings more consistently during hard driving
Improved rear-end response — provides a more direct and predictable connection between the chassis and rear suspension
Reduced drivetrain and suspension deflection — helps reduce unwanted movement during acceleration, braking, and rapid torque changes
Eight-piece construction — the complete IronBox kit contains eight machined bushing components
Anodized duralumin construction — provides high rigidity, strength, low weight, and corrosion protection
Motorsport-focused design — suitable for drift, track, time attack, and other performance builds
⠀ Compatibility ⠀
BMW 1 Series E81
BMW 1 Series E82
BMW 1 Series E87
BMW 1 Series E88
BMW 3 Series E90
BMW 3 Series E91
BMW 3 Series E92
BMW 3 Series E93
⠀ Compatible with vehicles using the corresponding standard BMW E8x or E9x rear subframe and mounting configuration ⠀ Fitment must be confirmed before ordering for BMW E82 1M, BMW E9x M3, xi or xDrive models, BMW E84 X1, vehicles with a converted rear axle, and vehicles using a modified or custom rear subframe ⠀ Compatibility must be determined by the installed rear subframe and mounting configuration, not only by the vehicle model or engine ⠀ Kit includes ⠀
⠀ This listing is for the rear subframe mounting bushings only ⠀ Differential bushings, suspension-arm bushings, mounting bolts, and other rear suspension components are not included
Installation information ⠀ Installation requires lowering or removing the rear subframe and extracting the original rubber-metal bushings using suitable equipment ⠀ The rear subframe and all chassis mounting points must be inspected for cracks, deformation, corrosion, damaged threads, and previous repairs before installation ⠀ The orientation and seating of every component must be checked carefully during assembly ⠀ Solid subframe bushings transfer suspension and drivetrain loads more directly into the vehicle body, so the condition of the chassis mounting areas must be verified before use ⠀ All mounting hardware must be inspected and tightened to the appropriate specification ⠀ Rear suspension alignment must be checked after installation ⠀ Installation by a qualified suspension specialist is recommended