Starting with the time proven CY/Zenoah 2 bolt case design, we have taken it to the next level, machining them from solid 6061 T6 billet aluminum. Carlo Catalanotto of CC Racing Engines correcting the transfer ports size and shape to give you the best possible performance. Use with a modified cylinder to match the case�s transfer ports, and you will see a significant increase in power. DarkSoul Racing has redesigned the flywheel shroud to reduce the amount of debris that is able to enter the flywheel area reducing the chances of damaging your flywheel. This shroud is also removable, and available separately as part of the systems modularity. Should an engine case get damaged, no need to replace the whole case AND flywheel shroud. Darksoul Racing�s new concept in performance RC engines. Utilizing the best that the large scale RC engine market has to offer, we have modified or outright re-designed and improved these products to give your large scale on and off road vehicle and marine applications the maximum performance. DarkSoul Racing with assistance from CC Racing Engines has taken large scale RC engines to the next level with a completely modular engine system to fit your every large scale RC need, be it road racing, off road racing, marine use or just straight up bashing, we will have an engine to suit you, from mild to just plain crazy. Have a look through our engine parts and complete engine section, we offer billet cases in both 2 bolt and 4 bolt configurations for both land and marine use, as well as conversion kits for both to use marine cylinders on land based RC applications for big horsepower.