RSS Part # 3-307 XL (+15mm in length) Inner Spherical Bearing (Mono-ball) End Kit: Set of 2. Fits 991 GT3 OE Front Control Arms, 981 GT4 Front and Rear Control Arms, Fits 986, 987, 996, 997 with GT3/RS OE Front or Rear Split Control Arms, Fits any RSS Tarmac Series Lower Control Arm or replaces any OE Porsche Split Arm Inner Bushing. Provides a Bolt On Mono-Ball Performance Solution replacing rubber mounted OE inner mono-balls. The Extra Long Monoball Housing Design (+15mm) allows for more negative camber adjustment / gain vs. standard aftermarket or OE inner bushings. The XL Design allows for proper stud engagement between inner and outer control arm with when running aggressive negative camber settings. For camber shim kits see RSS Part # 308.