Ok, I know I am going to get flamed for this.But I have searched and searched trying to find out what the difference is in the stock Puch cylinders.But I can not find any definate answer. I know 1-5 is aluminum, and 11,22, and 33 are High torque.Then there are the 1 and 2 Magnum cylinders. Then I have also heard that 8 fin cylinders are high torque.But I have seen #1-5 cylinders with 8 fins. I have even looked in the wiki but that wasnt much help either. Does anybody know for sure?