RSS XL Control Arm Bush (+15mm in length) End Kit. 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.