downpipe
jack car up, put on jackstands
undo 3 14mm nuts off bottom of flange on the bottom of the elbow
undo 4 nuts off elbow, lever with a persuasion bar... large flathead screwdriver, etc
don't forget to undo the stock bracket further down if you have it... usually bolted to the bellhousing i think... that will give movement on the downpipe
the little rubber cap is well known for bursting... get it either welded shut or another rubber cap