Does anyone have any experience of header pipes or down pipes blowing??? Cant seem to find the hole but its definately one of them
G’day mate
Normally one of three places. The joint at the cylinder head, the area where the 4 pipes come together at the lower end of the manifold, or the joint going into the cat [or bypass pipe if you have one]. If the noise is further back, then any of the joints may be leaking. Right at the back, I have seen the pipe that feeds into the silencer rot out of the box, but that is unusual
HTH