Hi all.

I want to make up a flange so that I can put my standard catalytic converter back on for the test.

Makes more sense to split the downpipe at the triangular flange and add the standard catalytic converter. Does anyone have the dimensions used at this flange so I can make one up without taking it off the car?

This is the decat I have

I could do with knowing the measurements too if anyone knows as i put one of these eBay downpipe and decats on my car last week to replace my blowing blueflame downpipe and 100cel cat as it was blowing at the flexi and was originally going to look at getting a new flexi welded in the blueflame one so it could go back on for mot but with the new pipe having the bolt out section I was looking at flanges on eBay the other day with a view to doing as you say and cutting up and welding a flange on the old cat so it's a quick swap,if I get chance to sort mine in the time been I'll let you know which flange I used