All I added was the resonator and a new tail pipe. I had to get a new tail pipe because i gave away the old one with my HGJBB when I sold it.
I purchased the tail pipe from a Cummins/Onan Facility in Sumner, WA and had it shipped to me. They were the only ones that had the extended length drop pipe I needed.
What is the item you listed as A602M244 Muffler Accessory Kit?
The Resonator won't degrade generator performance. It softens the harshness of the exhaust note. I'd recommend it for ANY genny installation.
I also had to get a longer propane hose since the propane inlet is on the opposite side from where it was on the HGJBB. I bought a 36" hose from my local RV parts store.
