This is my topic as I had 5 in total on my hawk!!
Best bet is to change the resonated section (attached to the back box) and then put a louder back box on. I had a WRX blob with a WR sport/Prodrive back box that sounded nice. When I got my hawk I was disappointed with the sound. First I put the old WR/prodrive Back box on which made a bit of a difference but not much. Then changed the resonated section for non res, which was better again, it started to get a bit of burble back. I then changed the back box for an TSL back box which was much better. In the end it had an afterburner vortex back box which sounded nice and burbled nicely!!!. I then went decat right through which sounded nice but was too loud!!!!!
So, I would change the resonated section and go for an afterburner/TSL/Hayward and Scott/Ninja - along those lines. Think you'll find the prodrive too quiet.
The only time you will need a remap, assuming its standard at the moment is if you start taking cats out.
Hope that helps!
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10 Years of Scoobies:04 WRX SL, 06 HAWK STI, 97 JDM WRX STI WAGON, 05 WRX STI, MK3 FOCUS RS, now Porsche Cayman S
Last edited by Lucky; 18-06-2013 at 01:48 PM.
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