Installing Anti-Roll Bar

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The 911 GT2 (997) anti-roll bar can be installed on the 911 GT3 and GT3 RS (997) (different diameters).

Anti-roll bar diameter (installed as standard): 911 GT3/GT3 RS = 23.6 x 3.5 mm (0.93 x 0.14 inches)/911 GT2 = 25.2 x 4.4 mm (0.99 x 0.17 inches).

Install rear anti-roll bar.
Always tighten the connecting links (suspension/stabilizers) in three steps (Step 1: tighten to 50 Nm (37 ftlb.). Step 2: loosen by 90 degrees. Step 3: tighten to 65 Nm (48 ftlb.))!

On 911 GT vehicles (adjustable anti-roll bar), check the position of the connecting links (suspension/stabilizer) at the anti-roll bar (GT3/GT3 RS/GT2). Figure shows the position -2- .

The setting/position is specified in the following 4400TW ADJUSTMENT VALUES FOR SUSPENSION ALIGNMENT

Fig 1: Identifying Adjustable Rear Anti-Roll Bar (911 GT Vehicles)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 1.1. Engage anti-roll bar on the connecting links (suspension/stabilizer) -2- and then secure on the rear axle carrier using two hexagon-head bolts -1- on each. → Tightening torque: 23 Nm (17 ftlb.)
  
  Fig 2: Identifying Anti-Roll-Bar Mount
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 1.2. Fit new M10 collar nuts on the conn↓ecting link joint -2- . Counter with a Torx socket-wrench insert when tightening → Anti-roll bar to connecting link . Observe 3-step tightening procedure.
  Step 1: → Initial tightening torque: 50 Nm (37 ftlb.)
  
  Step 2: → Loosen by 1/4 turn after initial tightening: Loosen by 90°
  
  Step 3: Tighten to 65 Nm (48 ftlb.). → Final tightening torque: 65 Nm (48 ftlb.)
  
  Fig 3: Identifying Anti-Roll Bar To Connecting Link
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.