The Resonator in your front pipe is gargbage when you change the header it does not do much to stop the rasp and weird sound frequency you get with switching to a aftermarket header.
i purchased a Vibrant resonator cut out the resonator in the front pipe and welded this in. Cleaned up the tone, no rasp and sounds great. You could also get the JDL ultra quiet front pipe but I don't know how good the resonator is, the Vibrant is well known for its quality. Just be aware it a tight fit so you might need to cut a section of your cat back and weld it.
https://www.amazon.com.au/Vibrant-11.../dp/B000E3VHWI