So you want to turbo your SC400/430, LS400/430,
GS400/430, Tundra and all those Lexus-Toyota V8 vehicles?
Officially there isn't any turbo kit out in the market and there
wont be for many more years to come. The only way to turbo your
car/truck is to make your own. Here is your chance to make it
yourself or have some fabrication shop to do the work. Header
flanges come in mild steel or stainless. The flange exhaust
ports are 38.1mm / 1.5" so you can use either mild steel or
stainless steel 1.5" tubes. The 8 mounting positions have been
cut to 10mm. The holes will be slightly tapered so that the
holes will be about 9.8 or 9.9 on one side. This is because if
the nature of water jet cutting. The size has been left this
way so that you can use maybe a 10.2 drill to create a nice snug
fit to your own head studs. Other manufacturers may cut the
holes bigger to start with, but I believe this way is better as
it allows for much greater accuracy for port matching. If you
had a sloppy fit the header will not go back into exactly the
same position each time it is removed from your engine. With a
snug fit it will match up perfect every time and if you've spent
hours port matching, this is what you need. These flanges were
designed by an enthusiast for fellow enthusiasts. They were
designed using AutoCAD and are water jet cut with a high
precision CNC machine. The price below is for two flanges.
* 3/8" Mild Steel Flange (pair) $110 USD
