Nothing big, but I did not like what the smoke stack looked like when i bought this unit. So my dad found me a chrome truck stack. A little running around to find all the part. I did not want to weld on the chrome, SO i cut a a 5" OD pipe length wise. took about 3/4" out of it squeezed it together and sleeved the inside of the exhuast 7" deep into the top and bottom. Put 8 screws top and bottom and a SS clamp. Looks pretty clean.
I am happy with it.
Will work on the other one soon