u/Accurate-Ad2204

Got quoted almost $3800 CAD to replace the cats on my 2012 Infiniti G37x and I’m thinking about going with high flow cats instead. What brands do you guys recommend for fitment, no CEL issues and Also looking for a catback or axle back setup that gives the car a deeper/more aggressive sound without being much louder than stock or super raspy/droney. Lastly, is it safe to buy high flow cats from Alibaba or are they usually poor quality? Anyone here actually running them long term?