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godwin · 03-02-2013, 08:54 PM

It depends on how much you have modified your drivetrain. Aftermarket cat usually have less precious metal and surface area.. so your readings will be higher if your tune is on the rich side etc.

03-02-2013, 08:54 PM	#2
godwin 2x Variable Nockenwellen Steuerung Join Date: Oct 2002 Location: N49.2 W122.1 Posts: 6,176 Thanked 1,174 Times in 704 Posts Failed 67 Times in 51 Posts	It depends on how much you have modified your drivetrain. Aftermarket cat usually have less precious metal and surface area.. so your readings will be higher if your tune is on the rich side etc.