O.S. M2000SC manifold has a spring connect header. Polished aluminum with steel springs. This product includes one M2000SC manifold. Two steel springs for connecting to engine. One rubber exhaust gasket.
Diameter: 0.73" (18.6mm) inner diameter of mount flange
Diameter: 0.87" (22mm) outer diameter of mount flange
Diameter: 0.51" (13mm) inner diameter of manifold pipe
Diameter: 0.63" (16mm) outer diameter of manifold pipe
1.2" (30mm) mount surface to rear of manifold