Addco 939 Rear Performance Anti Sway Bar Stabilizer Kit

Let's face it, most decisions made by the automakers are based on one factor - cost. Without a doubt, it's less expensive to manufacture and install smaller anti-sway bars, or in some cases, leave them off completely! Our stock suspension does an adequate job in most situations. Where you may run into a problem (no pun intended) is when you need to make a sudden lane change to avoid an accident or when you find that curve in the road is a little sharper than you thought. As you vehicle begins to turn, the body will " roll" transferring weight to the outside wheels. This causes the front end to "plow", or what is technically known as understeer. The result - your vehicle wants to keep going straight and you're out of control!

With the addition of a ADDCO anti-sway bar, body roll and understeer will be greatly reduced resulting in a safer, more balanced suspension.  ADDCO carries the world's largest line of anti-sway bars to fit virtually any vehicle. We've been supplying suspension components for over 38 years, and we're committed to making your vehicle the safest on the road.

Neutral SteerThe front and rear of the vehicle will drift an equal amount and you will end up close to the starting point (actually, you will end up a little further out since the front and rear are drifting the same).

UndersteerFront tire drift causes the vehicle to refuse to turn as sharply as the direction of the wheels are pointed. If the wheels and the throttle are held steady, the vehicle will make an ever widening circle.

OversteerRear tire drift is greater than that of the front and the rear tends to "spin out". The vehicle will end up closer to the center of the circle because the rear tire drift changes the direction inward.

Tire DriftThe transfer of weight to the outside front wheel with an inadequate front or rear bar distorts the tires so they actually drift sideways during cornering.

Bigger is not Always Better

Even a small increase in bar diameter provides a major increase in anti-sway bar effectiveness. Play it safe and stick with ADDCO's recommendations to achieve the level of handling you desire.

Sway Bar Dia. 1" - End Link Kt # N/A - Footnote(s): On some high performance models (SS, GTO, 442), the rear lower control arms are enclosed (boxed) for added strength. The #939 kit will not work on cars that are equipped with these enclosed arms. The #324 must be used on these cars or the #690 or #692 as OE replacements The #690 and #692 are for the 64-72 models only.