G60 throttle body. What diameter is the bypass butterfly?

Question as per the title really, I don't have a G60 throttle body to hand and need to know the diameter of the boost bypass valve, can anyone help?

 

I have one on the floor in the garage now. Will let you know
Jon

 

55mm ID main, 40mm ID bypass
Jon

 

I'll choose my words carefully Jon simply because I know you know what you're talking about but those dimensions seem huge, in my head I thought the primary was about 28mm and the secondary about 42mm and the bypass was about 28 too.. back to the drawing board for me then

 

The one I have hasn't got a primary/secondary set-up. Just a single butterfly. It looks std, but I'm no G60 expert.
Jon

 

Hi Jon, thanks, but thats not a G60 throttle body. The G60 throttle body is the same as a mk1 GTI, Mk2 16v etc throttle body with a primary and secondary valve but with the addition of a third valve underneath to dump boost pressure.

 

Interesting. I will post a pic up for further discussion, if you don't mind a wee thread hijack
Jon

 

Mickey your right. 52 and 35mm ID's resp.
There is a single inlet as specified earlier which then splits internally into a primary/secondary butterfly.
Will have to use this for something now......
Jon

 

Feel free to hijack away Jon

Does the one you have NOT have the third butterfly underneath? In all respects it sounds like a G60...

 

So can anyone with a g60 help?

 

All the numbers above are correct, I am 99.9% sure its a G60 TB
In summary, primary butterfly ID52mm, sec 35mm combined to a overall single 55mm port
and bypass 40mm
Jon