Hi, on monday i am fitting a centre decat pipe, is there much gains in replacing the stock resonated centre with deresonated before having a map tweak?
The cars an 02 sti already mapped for decat dp. I dont want it too loud either!

 

it will make the cabin noise much louder with no resonator.

 

Depends on what back box you have for overall noise, I had one on my old wrx with prodrive back box and was perfect soundwise and I had no issues with interior noise, on my current twinscroll car with genome back box it is noisier but still not to bad and doesn't drone on journeys, I fitted it because I wanted all my exhaust stainless so no worries in the future. Presume on a spec c it my drone more due to lack of sound deadening on floor. But I would say fit one.

 

Am i gonna seen improvement in flow? Dont wanna gain too much noise if i 'm not getting a flow benefit