Rotary Engine , Why is Billet Better? right here you can see we have added studs so we're actually increasing the overall strength of the block this allows you to actually remove coolant passages and increase the overall strength of the block leading to a stronger block increased horsepower and increased durability so by utilizing aluminum and CNC components within this modern 20b block or three rotor block you're able to save a little over 35 pounds so that type of weight savings in any automotive competition area is going to be great especially when you're mixing it with more strength and better reliability