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19.01.2005: Rear O2 sensor
Lower the downpipe with the cat to the floor (the length of the rear O2 sensor wire will allow that) and remove the sensor using an open ended socket or a 7/8" spanner. The pipe is free now.

The downpipe installation procedure for a 1996 Saab 900 (also applies to the 1999-2002 9-3 models). The pipe is supplied by Jak Stoll. It is a 3" aluminized steel downpipe with a Magnaflow high flow catalitic converter.

Tools:

  • ramps or jack stands;
  • 13 mm socket or wrench: downpipe to turbo nuts, exhaust clamp bolts (a 1/2" worked better in my case due to a tighter fit);
  • 7/8" open end wrench: O2 sensors;
  • flat screwdriver: to release the tab on the O2 sensor connector;
  • a heavy tool or a length of pipe to bend exhaust hangers;
  • wire brush: to clean the joint between the flex pipe and the cat;
  • exhaust sealant: to seal the joint between the flex pipe and the cat;
  • torque wrench.

 

 
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