ASG ULTIMATE Piston, polycarbonate, half teeth, M190, redThe ULTIMATE extreme performance helical piston made of a 50% stronger polycarbonate resin, with embedded steel teeth specifically designed to work with Extreme torque up helical gears (ref#17164) to give a extreme heavy tuning of 170 190 m s. All dimensions of the piston has been reworked to fit perfectly inside ULTIMATE gearboxes and gives a smooth low friction performance. The length has been adjusted to make a perfectly even contact between the