I had the Akrapovic full system with OPF installed this past week. They supply a bunch of wiring, which is supposed to rid the CEL. Anyway, it didn't. If you were just installing the back box system though, you should be ok.
Nevertheless, we drove down to DMS to get it mapped instead.
Stock it did 608HP, with the DMS map, we managed 770HP.
Just the Eventuri's and Keller DPs to go on now and then back to DMS.
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