I agree, copper doesn't play well with some metals. The straight pipe tubes appear to be stainless. They were difficult to drill into. The actual plan here is to get an exhaust I'm happy with. Using the bypass pipe plugs and stock muffler is more of an exercise toward this goal. I just had so much blow by with the straight pipe mod and the bypass pipes it wasn't funny. This copper plug mods appears to be working so I'll likely fab some steel plugs in the near future. Copper was easy to work with so I figured I'd paint em black and run with them awhile. I've also been playing with a Stebro sport exhaust but since my car is a daily driver I didn't like the drone. So I removed the Stebro. I did put on dead pipes to try and overcome the drone but I don't think they're long or wide enough. So I'll either mod it again or sell it. Still on the fence on that one. Thanks for your input. I do agree.
