I just measured my magnapacs on my silverbullet exhaust and they measure 14 inches, so they could be replaced with the magnaflow muffler in the pic. Would there be any performance loss with this swap? I don't run cats and got kooks LTs and a built block with a whipple. I would keep the x-pipe though. The reason for this is I really want to quiet it down, and these should be quieter, I think.