My dealing with flowtech have been less than satisfactory. If you're running an Olds engine I would not recommend them. I bought a set about 10 years ago and they fit perfectly, when those started to go bad (I used them on my winter rat for a couple years) I bought another set, same part #, but they would not even come close to fitting. So I bought another set, same deal, wouldn't fit (hit frame, and control arm). I returned them both and patched up my old ones. A couple years later, they were really bad, so I tried getting another set from them, still no go, I ordered three sets of these headers this time around, and non would fit. To make them work they would have had to have been cut apart, tubes rebent, and welded back together, ther was no simple way. So I ordered Heddman instead, fit perfectly, first time.
