Anyone dealing w/ exhaust issues may be interested in these innovative tack-welding clamps I found at www.icengineworks.com ...here is a short video demonstrating their use: http://www.youtube.com/watch?v=fVzX8KMe-lg Available in a wide range of sizes, I purchased mine (1.75" diameter) thru: http://www.summitracing.com/search/brand/ICEngineworks/?autoview=ProductName They work as advertised, and my welder sez they dramatically simplified his job, and saved me a lot of $. Also, after considerable seaching, the best prices I could find for . 035" wall, 321 SS mandrel bends, were at Sky Dynamics (locate w/ Mr. Google), where I received prompt and excellent service. I was also able to find an exquisite double slip merge collector from Burns Stainless, again in .035" wall, 321 SS. Fred DSCN2500.JPG