Contrary to poular belief, you don't really need a flex pipe, unless your exhaust is hard mounted. I've been running w/o a flex for over a year with no problems. Although you will feel more engine vibration. If you are building a downpipe for exhaust manifolds, you can reuse the stock flange for 3" pipe. It's actually a perfect fit once all the weld is removed. If you need 3" mandrel bends call Tom at Boyce industries in Franklin Park @ 708-345-0455. They supply exhaust parts to most of the spped shops in Chicago, so you can get it for about 1/2 price there. You may want to ask about the flex pipe, but it'd be hard to beat that Ebay price.