Please see links below. I went back and used Gorilla tape to seal between the clamp and 90. Also used self tapping screws to prevent the 90 from slipping off. After doing this, I agree with
@Kimberly Berg the boom could use some length. I will prob get 3’ of stainless exhaust and have a 90 bent at a muffler shop, then weld it onto the boom. Additionally, I ordered new cuffs to replace the swivel ones I used. Lesson learned!!
Also included a pic of the mount I made for each Motor.
Stainless 2" 90° Mandrel Bend Elbow - 16GA/.065" Wall - 1.5" Leg - SS304 Elbow Stainless Steel Exhaust Bend Pipe Exhaust Piping for Car Exhaust Pipe Modified, Stair Handrail, etc - ATOTL
https://a.co/d/dBY2BsM
EVIL ENERGY 2.0 Inch Exhaust Clamp,Butt Joint Band Clamp Sleeve Coupler Stainless Steel 2PCS
https://a.co/d/284XdX4