[405HP_Z06]

Anyone have any experience with ECULABS? ECULABS - Subaru reflash and advanced tuning

 

[405HP_Z06]

Going back to this really quick... hypothetically when I get a retune and can no longer disable P0420, can I install the defouler myself without other implications to the tune? I.e. I'm not going to ask my tuner to do it if that puts them at some kind of "tampering" risk.

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You can and will probably have to install the defouler yourself. I would zero out the rear oxygen sensor fuel learning strategy as it affects closed loop target AFR.