Headers installation...need help !!! - Page 2

08-01-2006, 08:46 AM

#26

PTE

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Join Date: Jul 2005

Location: S.E. FLA.

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05 ML-500 , 03 CLK5.5 AMG has left the Garage

O2 sensor location

IMHO if you mount them that far back away from the manifold and have deleted the 1st / primary cat, your gone to get the CEL. I posted this awhile back. I know this is a different car . but they function similiarly. I do not have the Secondary cats in the system

07-19-2006, 08:37 AM #6
PTE
Senior Member

Join Date: Jul 2005
Location: S.E. FLA.
Vehicle I drive: 03 CLK5.5 AMG
Posts: 284 O2 sensor deletion

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On my CLK with Kleemann headers & down pipes. I mounted the 100 cell race cats as close to the collector flange as possible. I also installed threaded bungs for the rear o2 sensors just after the 1st primary Cat. As close as possible. I did shim them out,( the rear sensors ) .125 so they didn't cause much disruption in the exhaust flow. I think there was maybe a little loss of H/P over a no cat exhaust (2 to 4 H/P) I also think that the closer you mount the race cats to the manifolds/ Headers. The quicker they heat up. The rear o2 sensors see the diff in temp. The ECU likes what it seeing. No err Codes are set. I did tell Cory @ Kleemann what I was up to, at the time, I was building the exhaust system. So I believe he left the rear o2 sensers alone , in the ECU reflash. Now The only Time I get a o2 sensor err code is on the Dyno ?? I don't know why. But never has it set a CEL or set a err code on the Street. Maybe you should thing about installing race cats?http://www.rpmoutlet.com/powercat.htm

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Last edited by PTE : 07-19-2006 at 08:41 AM.

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