Lift engine exhaust

I decided to change the original exhaust. It was too heavy and it was very large. This exhaust is lighter and less surface area to effect the airflow. I bought a 9 inch exhaust from ebay and a 180 degree bent pipe. I used 3mm steel plate bolted to the starter motor to support the exhaust. The 180 degree bend was cut up and welded to the exhaust. I'm not sure how this will affect performance but I will find out!