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Hi again,

I asked this question on SDU but not much luck, Zapf suggested 70mm but I dought it, it's smaller than that I'm sure. So does anyone know the inside diameter of the throttle (or the butterfly for that matter) on the RB25DETs?

Thx,

Freebaggin.

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https://www.sau.com.au/forums/topic/2562-rb25det-throttle-diameter/
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I know that guys upgrade their throttles to the XF version which is 65mm (Sub-zero 10.6 R33 for eg I think), so I'm sure the standard RB25DET is less than that ......or else they have gone backwards!

I'll have to measure it myself I suppose.

Freebaggin.

Originally posted by meggala

yes grim either a q45 throttle body 80 mm or an xf one

70mm is about right.

meggala

pull off the cross over pipe an measure it

Actually the Q45 throttle body is generally referred to as a 90mm... But the internal diameter is really more like 85mm...

Definitely bigger than 80mm though!

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