The lowest blanking plug from my OBX headers fell out yesterday. There was no chance of finding it.

I have managed to fit an 'Alloy bung/plumbing part hybrid plug' as a tempory measure but I need to get a bolt cutdown to fit before I would consider forgeeting about it.

Does anone know what the thread size of these is?, it looks to be about 16mm!, much bigger than any standard bolt or spark plug.

If I cant find one my only other option is to weld the hole up as it is only there for fitting aftermarket probes. And there is two more further up towards the turbo. Trouble is, that means taking them off

 

try checking out tsl motorsports website. They have a plug that you can use on most downpipes/headers for a very reasonable £11 or so.

Stuart