The Tyga pipes do look quite good but I can't comment on it's sound or performance; I can say a thing or two about the Yamamoto system though, which are made in Japan: 1- it looks great, 2- it sounds very good, 3- it's very light, 4- it's made of stainless steel, 5- it's well set up to work on the V4 400's & 6- being a Japanese system 'in my book', it's got kudos!
Ok, so that was more like 6 things about it, but you get my meaning. :D
There are a few other Japanese systems around and most are well built and look great too; so if it was my money & my choice, I'd go for one of them, preferably a Yammy though!

Below is a photo of mine; this system uses the 2 front downpipes & the little rear collectors; the can is a Yamamoto standard Carbon/Kevlar jobbie, which can take a Db killer if anyone so wishes.