Questions about this article Who tested the HP increase and are there test results I can see that you have?
The performance tests and the performace charts were made by BMW Stuttgart, Germany.
You can see them here:www.motorcycleparts-hornig.com/i/900/496/2/sr_1813100.jpgwww.motorcycleparts-hornig.com/i/900/496/3/sr_1813100.jpg
I'm interested in the outside diameter of these manifolder.
The outside diameter of the manifold (measured on the connection to the connection pipe) is 49,8mm
The inner diameter of the manifold (measured on the connection to the connection pipe) is 45,3mm
The inner diameter to connect the manifold with the cylinder is 26,3mm.