If you really need to know what the inside diameter of the throttle body is... I can give it to the metrology engineer in the quality assurance department to measure it... I'll get inner diameter, circularity, cylindricity, and circular runout... How does that sound?

I wasn't trying to get the fucker down to the micron - People were arguing about millimeters. Give me a fuckin' break... I'm just trying to help out.

So I guess to clarify for Stan:

I measured the inner-most diameter of the stock 420A throttle body to be 46mm plus or minus 1mm.

Tim
trwebb26@yahoo.com
White 1999 GS - Manual Tranny
Mods: B&M Shifter, Symbroski Shifter Kit, RRE SS Clutch Line, AEM Short Ram Intake, Clear Side Markers, GS