[chris steedman]

I have tested 2 identical tuned (by me) 916 bikes . Both are the same spec but one has a large airbox and i can confirm there is nothing worth while in it . They look great but your wasting your money as a power bolt on.

However as with a 916 or 996 the power band is all over by 9.500rpm . On a bike built with a powerband of max power being produced at 11k-11.500 rpm we will see gains from a larger box

As with the much shorter and wider shower injection system the gains will be higher up the rev range from the different tuning frequencys the short intake stacks provide us with . Again fitting these to sometihing like a 916 bp or 996sps with its 9500 rpm powerband it will be likely to loose power all over the range. To make use of them the engine will need headflow and cams that can move the powerband into the tuning range of the shorter shower injection system. This means a cam combo with 748r or G exhaust cam.