Jan 29, 2016 at 10:01 AM
I have a '91 5.0 liter. I removed all of the stock exhaust system [from the exhaust manifold back] and replaced it with aftermarket H pipe, tail pipes and FlowMaster mufflers. The sound wasn't as \\"aggressive\\" as I had hoped so maybe a more free-flowing muffler would have been better.
I replaced the cats with stainless steel flexible pipes, they are woven and look like giant \\"Chinese finger locks\\" we used to get as kids. Got them from Advance Auto.
Couldn\\'t find the 3-hole exhaust flanges so I cut the inlet necks off of the cats and put a short section between them and the flexible pipes.... took a little trial and error to find the right piece for that but did get it at Advance.
The other thing I ran into was I bought the pipes at CarQuest and their supplier\\'s parts, specifically the H pipe, was about 1 inch short. That created a problem with the welded on hanger brackets on the tail pipes. Fortunately, I was able to make up the difference with the \\"adapter\\" pipes between the cat necks and the flexible pipes.
Happy to give you more details on the \\"flex-pipes\\" and the flanges I cut off of the cats.... might even have some pics.
Hope this helps.
mike
mike