Fits on Piaggio engines. Sprinting exhaust specific for the Polini Evolution 47.6 cylinder. Wide powerband, very high torque and power. Only the JS70 EVO exhaust comes with a CNC milled manifold that gives a smooth transition between the cylinder flange and the exhaust header. This in combination with the expansion design garantees top performances on the Polini Evo cylinders. Also including aluminium silencer, laser cut bracket, springs and bolts.