Since i'm running on a new setup, i also thinking to redo back my exhaust system. Last 3-4 days ago, i managed to get a 'used' R3 Stage 3 header which i found when i surfed online market to replace my Hotbits 4-2-1 header. After finished dealing with the seller, i straight away bought it as the price fit my budget and other than that, R3 department has stop the production of this kind of header, so i can say that this header is quite a rare item. Picture below.
pix before i clean it with Autosol
looks almost like Mugen 4-1 header
After a few runs with the new header, i can say that this header is quite good. Most people said that this 4-1 header will make bad low end power, but thank god i didnt spot any decrease in low end power. It gives a very good mid range power and superb high end power especially after MIVEC kicks in! Badass sound! I kinda like it very much.
The only thing that i hate about this header is the header runner is quite long, below the oil sump, meaning that the clearance with the ground is not so good. Not really appropriate to use on the road in my country which have a lot of speedbumps. Really scare it will bent! Hope it will not. If thats happen, than i have to find another one :(