The STE BK will fit intakes of approx 2" to 2 5/8". The BK features a rubber sleeve that can be rotated to open a by-pass allowing a higher air flow up to 50 kg/h; by-pass closed 1-35 kg/h

Using an additional adaptor STE 118 will allow the BK to fit intakes as small as 1 1/2" similar to the STE SK and allow for higher RPM air flow and synchronisation. This is the most universal combination.

Perfect for balancing multiple carburettors and fuel injection throttle bodies. 

Genuine German manufactured tool