[m5james]

I bought a generic 3" x-pipe for $25...there's nothing magical about them, so why pay more. I haven't installed anything yet, but I've got a little drone now at low rpm+high gear due to catless downpipes. F10 M5's have an x-pipe as do most full X5M aftermarket exhaust systems, I can only assume it's for a reason, so I'm adding one regardless...I'm thinking I might do a Magnaflow resonator (which is internally x-piped instead of the bare x-pipe) or little resonators like Eisenmann/Fabspeed/Challenge does to fight off droning. I'm not expecting much in gains, I just wanna hear the turbos like in some YouTube videos I've found but see if I can avoid drone as well.