Stock looking but stronger crankcases for 2007 to present Touring models. Cases are made out of superior 356-T6 aircraft grade aluminum and feature thicker wall sections, reinforced front motor mounts, Timken sprocket shaft bearing and come complete with cylinder studs and cam bearings installed, making them strong enough for even the most demanding applications. Installation requires modification of the stock transmission housing. A drilling fixture kit to make this a breeze is available separately. Installation also requires the separate purchase of an oil line routing kit. Cases are powder coated and clearanced for up to 4 13/16" stroke and cams up to .720" lift.