is that CAD or some type of milling?

 

that exhaust side loks really rusty, but your crossmember is awesomly tight. cool ---- man.

 

yes, it is mastercam V9. i drew up a contour for each runner individually and then just extruded a round surface along the line to create the pipe. this way i was able to make sure that cylinders 1 and 4 are the same length and 2 and 3 are as well. they are within about 2 millimeters of each other. the reason i did all this is because i want my turbo to sit right about where the ac compressor would normally sit. then my charge side will blow right around the rad and into an ic infront. i am still trying to source a local place for 1.75" mandrel bent stainless.