One of my exhaust manifolds ( Log style) is cracked. A new replacement is $280. I fiugure that is one cracked (posibly from all the rust inside weakening the wall) then the other one is not far behind and son on with the other motor. I would like to replace all the maifolds with tubular headers but the ones I have seen for turbo applications dont put the turbo where I want it. I want to know if anyone has attempted to make their own headers, how hard it was, and where did you get the materials? The turbo headers I have seen cost $6800.00. I can't justify spending that kind of coin to gain 70 HP. Here is a picture of the manifold. The turbo sits on it and hangs over the valve cover.

Have you seen these?http://www.cpperformance.com/detail.aspx?ID=285
It seems you could use these as a starting point.

Would these work for you, better than oem and priced right
http://revolutionmarine.com/shopsite...bcexhaust.html

I have 4 fresh water manifolds call Tony 770 932-6694

A water jacketed header is not easy to make. I would suggest modifying an existing tube header, that way you only need to modify or add to 1 jacketed tube.
Another possibility might be a cast header with rear outlet (rather than a cenered rise outlet). Hardin P1000s flow pretty well. They have a horizontal outlet at the rear, near where your current log style exits. You might be able to fabricate the turbo mounting.
Gary

I used a set of CMI split tops. I ditched the elbows and made some short transition to mount the turbos.

I made a number of custom Turbo Headers in the
past and can send photos from my shop computer
send me your Email and I will send you photos
and some tips.
Mike J.

I made the headers, downpipes, etc for my 1200hp twin turbo Corvette. I used 321 stainless from Burn's Stainless and Specialty Products Design. You can buy straight tubing, u-bends, j-bends, flanges, v-band clamps, etc from them in anything from mild steel, several grades of stainless, inconel, etc in several guages. I've never built water jacketed headers, and I'm sure it's a bit more challenging than building automotive style headers, but it ain't rocket science and can certainly be done for less than what you'd pay retail if you know how to TIG weld and have your own equipment. You can get a 175 amp square wave TIG from Lincoln or Miller that is more than capable for less than $1500. Materials for 4 headers would probably be about the same, assuming heavy guage stainless inner tubing and lighter guage external tubing.

I've got alot of detailed pictures of my buildup on my website, hyperlinked below in my sig.

Try Bob at Lake Precision Welding in Ohio. 440-629-1444

He had been making exhaust parts for Gil and Corsa for years. Excellant fabricator with very fair prices. He has alway done modification for me for pleasure and race applications.

I second the above. Bob is great ... excellent work at reasonable prices and delivers when promised. Did the tailpipes for my 382 Formula last summer.