Just replaced my engine into the van after winter overall. Removed Heat exchangers for J tubes. I know not as good heating can work etc. I don't use the bus in winter so its not an issue and we didn't need it going to France last year. My problem is where the J Tubes join the exhaust the bolts are now touching the moustache bar. No matter how i position them this is happening. They were close when i had exchangers but now its an issue. I was thinking a rubber wrap on the bar to avoid noise and vibration. Any ideas please.