i dont think you explained to me in another mani thread you made about why you use individual exhaust flanges instead of a solid one? does it allow more expasion due to heat or just merely something thats kind of your signiture?

 

Think he wanted a seat warmer.

 

It's used because of the head design. Some heads use individual flanges for each runner.

 

ok but is it more for clearance or stability? i understand some applications use the design but wouldnt it be more worthhile to use a one piece flange for longevity?

 

most motorcycle exhaust headers seal with individual gaskets for each cylinder port to it is a good idea to have each runner seal with its own flange to help ensure a proper seal. the head on this engine actually has part of the casting forming a pocket that the gasket sits in, hence the reason why the flanges are not at the end of the pipes. in a lot of headers the flange will actually be loose on the runner with a step on the runner that it forces into the gasket. i think if i do another bike header, this is how i would do it to make it easier to line up all the holes... i was just pressed for time making this one so i just welded the flanges to the pipe rather than making a step for them to seat against.

 

------- brilliant work

 

that's a hayabusa motor right?

 

no, gsxr 1000. that is the cc limit for the class.

 

wanna make one for a honduh. and im still considering sending you a set of ITB's to be rigged up to a B series manifold