BMW Trailing Arm Monoball Set - FCP Euro 33326763092SM

This set of trailing arm ball joints start off life as a standard replacement Lemforder ball joint for varying BMW applications. They have been machined to specific tolerances so that they can be used to replace OE p/n 33326763092 trailing arm rubber bushings for E8X 1-series and E9X 3-series applications.

What is a monoball?

A monoball is a spherical bushing (ie ball joint) that replaces stock rubber bushings and eliminates inherent deflection created by OE rubber bushings. Unlike solid or polyurethane bushings, monoballs allow for complete unimpeded suspension movement while allowing for a completely rigid central mounting point. It is truly the best of both worlds and is best utilized in applications where the pivoting point is both up and down as well as side to side.

Why a monoball?

A monoball bushing provides full articulation of the suspension with no binding or deflection. A stock rubber bushing is rubber vulcanized to a metal sleeve which deflects (twists) with each suspension movement. Rubber bushings provide great comfort but when pushed in a performance application they allow for undesirable suspension movement and slop. Under heavy braking rubber bushings can deflect quite a bit making the car unstable. Stock rubber bushings also provide unstable and unwanted suspension movements on uneven road surfaces as well. A mono-ball being a solid mounting point with no room for play around its pivot point creates a completely rigid mounting point while allowing appropriate suspension travel and movement. It is the ultimate solution for a complex multi-link style suspension.