u/Rak7991

Hi forum,

I have a xforce varex muffler which is valve controllable on my ford focus st mk4 with 2 stock cats. I feel there isnt much exhaust sound and there is little vibration im cabin. I used to get some pops in sports mode when i just removed the secondary Cat. I want to know if i replace the secondary cat with a vibrant quiet porforated or xforce porforated resonater will it make the car still pop in sportz mode and reduce drone ?

Hi forum ,

I own a Ford Focus ST 2021 automatic in Sydney Australia. I had removed the secondary cat. It sounded great in sports mode but had lot of drone noise so i installed a xforce varex muffler axel back and reinstalled the secondary cat. I am experiencing some minor vibrations in cabin and drone as well. Im planning to remove the cat as it is not producing any pops or bang. How can i reduce the drone noise and vibrations with cat removed ? Doez sound deadning work or vibrant quiet noise resonator ? I want to keep the pops in sports mode but also want it to be quiet at the rear seat.