1) YD100-CDH Cylinder 50MM.Two in one cylinder
2) New Design inside, please refer to pictures listed;
3) New Design on outlet to muffler and air intake to manifold intake;
4) 40mm Intake Manifold Stud Spacing;
5) Cylinder body Gaskets are not included;
6) Cylinder inner diameter: 50mm
7) Inside wall of cylinder: Electroplated