Almost all street cars come from the manufacturer with an anti-roll bar as they are a common part of modern suspension systems. Its intended function is to reduce body roll in all situations. However, they are designed to be overly soft for maximum comfort and to add understeer. Every Dinan-tuned anti-roll bar is built and tuned specifically for each BMW chassis. The Dinan Anti-Roll Bar further lowers the amount of body roll therefore keeps your BMW more level than stock, and reduces understeer (while still allowing just enough body roll) to improve mechanical grip. This improvement gives the driver a much more planted and confident feeling in every corner.
The 15.8mm Rear Anti-Roll Bar may be added to the Stage 1 Suspension System for those who are building their high performance suspension system in stages. The Dinan Rear Anti-Roll bar is 23%-326% stiffer than the stock rear bar, depending on model*. The matching Lightweight Tubular Adjustable 28mm Front Anti-Roll bar should always be installed as well for proper balance.
Only recommended for non-xi vehicles if equipped with D120-0530 28mm Front Swaybar, and one of the following: Limited-slip differential or rear tires that are wider than the front tires by 20mm or more.
+Reduced body roll
+Increased mechanical grip
+More stable at limits of grip
*Stiffness ratings vary by model and size equipped from the factory. See Additional Information tab.