Does anyone know anything about the Fujitsubo header? I found out it weights 4.9 kgs compares to stock 9.4 kgs, Spoon and Mugen 6.4 kgs. Base on the price in Japan, it should be somewhat cheaper than Mugen and Spoon.

http://www.fujitsubo.co.jp/

Here's a photo I found on the site

 

Fujitsubo Super EX
4-2-1 Design
Diameters are 45 - 50.8 - 60.5
Cost is 85,000yen

For comparisons sake...take a look at Mugen
also 4-2-1
Diameters are 45 - 80.8 - 60.5
Cost is 128,000yen