The donor car here was a Porsche 911 997 which needed a new ABS sensor on the front let, but the guide will be very similar for the front right, rear right and rear left. First you will need to diagnose the fault and find out which sensor is faulty by using the iCarsoft i960 kit for Porsche right here
http://www.diagnostic-world.com/pages/Porsche_i960_iCarsoft_Multi_System_Diagnostic_Tool_SRS_ABS_Engine_etc__189383-z=564795&p=108089.cfm
Then you can fit the correct ABS sensor, and reset the fault codes and warning light with the i960 kit again.
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The Porsche ABS diagnostic reset tool iCarsoft i960 is available here http://www.diagnostic-world.com/pages/Porsche_i960_iCarsoft_Multi_System_Diagnostic_Tool_SRS_ABS_Engine_etc__189010-z=605301&p=108089.cfm
What kind of exhaust do you have on your car? It sounds GLORIOUS!