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I am not installing DPs. It definitely adds HP&TQ but I had a bad experience with cats failing after 20k miles in the aftermarket DPs on my wife's e89 N54. So, I now stay OEM on the DPs. AA Signature Exhaust, Castrol SRF, MPSC2s, a track alignment and I hit the track!
Last edited by Vintage; 01-19-2019 at 08:28 PM..
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