this is on the akro site,i think 98 rear wheel stock is the # and 110 or so with pipe and pc,go check it out.
The explosion of power from 12400 rpm on is particularly awesome, and where the stock exhaust starts to drop off, with our system the engine keeps pulling to nearly 14000 rpm, with the rear wheel receiving 110HP. Very suitable for racing. Max increased power at 13900 rpm is 14.9 HP.
The outer sleeve is available in either carbon-fiber or titanium. more
marbod told me about it today,thx