This has been a long term project on and off over the last 18 months. The idea is easy, sound waves flow up and down the intake and if things are proportioned right then at the right speed you can have the high pressure wave hit just as the valve is closing to ram just a little more charge into the cylinder.
I had an idea of the range of length that would give the best power but on the GTS the max power is quite a bit lower than the max speed due to the gearing. So rather than try and boost the max power the idea was to extend it or move the max power to a higher RPM range.
This ideal bell and replaceable bits of aluminum tube was produced to test out different lengths.