I have used Gibson and been very happy with them. One on a 2000 Expedition and recently installed on my 2011 Expedition. Sound was great on the 2000 as it had dual outlets. No Drone. Much quieter on the 2011 due to dual outlets not being available due to not enough space. Relatively easy install in the drive way. My 2011 system is all 304 SS. No Worries.