Got this to replace the Magnaflow I installed for better flow. After a few days I got tired of how loud it was and tried this Dynomax and it's a lot quieter, I wouldn't say it's quiet but I don't mind being mind-blowingly loud in the car. So far I haven't noticed any difference in flow characteristics between the Magnaflow and this Dynomax, but the noise level inside the car is such that you can now have a conversation at highway speeds.