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The term, "bump steer" is commonly misunderstood. It really refers to toe-change during suspension movement. The ideal is zero toe change throughout the suspension travel. If it's off, the vehicle may exhibit unsettling handling during cornering as the suspension loads and unloads. Independent front and rear suspensions can have potential bump steer issues.
The popular bump steer kits (longer bolts and spacers) are mere approximations for ride heights lower or higher than the factory spec.. Don't worry about getting it exact because it won't be, just maybe closer.
The bump steer kits by ER, Rebel Racing and others can provide more accurate adjustments. However, many people only use the adjustment spacers to visually align the tie rods horizontally, then call it a day - also an approximate setting.
For those who prefer to accurately minimize bump steer, here's the technically correct method of achieving that objective:
As you can see, it takes some equipment and effort to do it right. On a track car, it's an essential adjustment for best handling. For a street-based car, not as critical, but YMMV.
Sherwood
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