If you choose the Arrow exhaust manifold, you'll get a power boost of up to 5 hp out of your Aprilia MX 125, plus an additional torque boost not specified by Arrow. Unfortunately, this requires the removal of the throttle, which leads to the expiry of the operating license.
Arrow protects its exhaust manifolds extra with a layer of clear lacquer, which is applied directly before finishing. According to our experience, even with the greatest care and the highest quality of paint, fine cracks in the paint layer can occur during transport. Therefore we recommend to touch up with heat-resistant clear varnish after receiving the manifold.