Magnum 5.9/Doug's headers--what diameter exhaust pipe do you reccomend?

mderoy340 said

2.5 full mandrel bent summit kit on my car. No drone and uncap the cutouts, 6 wingnuts at the track.

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This is what I was running when I had the Doug's Headers on. The Summit DIY kit with X-pipe and cutouts, exiting from the mufflers, heating the axle grease.