silencer

While I was searching for a way to purchase only the silencer can of the Ixil '19-20 RC full-system to replace mine(damaged), I found out that Ixil might be using the same silencer for most, if not all, of their RC exhaust products. I mean, all the RC products' silencers have the exact same...

As you can see by the pictures, somehow the threaded part snapped off. So no more putting the bolt back in. Should I find a way to plug it or leave it and just put the rubber grommet back on?

Well, They are cracking down on loud exhaust in my area, and I want my two bros exhaust to be a bit quieter. Bought this cheap butt plug insert for Aliexpress, was able to place it into the inlet of the exhaust. The sound was reduced by 1db, I used a measure tape and an app on my iphone...