Bumpsteer Kit 79-04 Must w/ Manual Steering Rack

The Bumpsteer Kit 79-04 Mustang with Manual Steering Rack by STEEDA AUTOSPORTS addresses one of the most critical suspension geometry challenges facing manual-rack equipped Fox-body and new-edge Mustang owners. Bumpsteer—also called bump-induced toe change—occurs when vertical suspension travel alters wheel alignment, causing unpredictable steering inputs during cornering, braking, and acceleration. This kit is engineered for enthusiasts and weekend racers who demand predictable, confidence-inspiring handling through any road surface or track condition.

STEEDA's solution uses precision-manufactured tie-rod angle correction components to maintain consistent wheel toe geometry as the suspension compresses and extends. Manual steering racks present unique packaging constraints compared to power-assisted units, requiring geometry-specific hardware to achieve proper bumpsteer correction. The kit modifies the relationship between the steering tie-rod and suspension's vertical motion, effectively lowering the steering axis angle relative to the suspension pickup points. This engineered approach eliminates the on-center wandering, mid-corner pulling, and abrupt steering transitions that plague unmodified manual-rack systems, particularly during aggressive driving or under heavy lateral loads.

Manual-transmission Mustang builds—especially those combining stiff springs, lowered ride height, and wider tires—benefit most from this correction kit. Street drivers experience improved steering response consistency, while track-focused builders gain measurable lap-time improvements through better mid-corner stability. Installation pairs seamlessly with other suspension upgrades including coilovers, strut tower braces, and sway bars. Weighing just 2.85 lbs with compact dimensions, this kit requires no cutting or welding, making it accessible to shops and DIY builders with basic suspension knowledge. Compatibility is confirmed for 1979–2004 Mustangs equipped with manual steering racks—verify your rack type before ordering.