What size plenum opening?

[meatball]

Does any one know what size a standard 450 chims plenum opening should be?
Thanks in advance

[Bomber Denton]

68mm???????? Not sure but this rings a bell.

[ACT]

65mm

[meatball]

Cheers chaps im a little puzzled? Ive got a 70-72mm ish on mine and i think its all standard?
does anyone have any photos of a standard size opening

[Bomber Denton]

They can be re-bored to 71mm

[boosted ls1]

Bomber Denton said:

They can be re-bored to 71mm

and fitted with a bigger throttle plate

Boosted.

[spend]

Then again.. If you are fed up cleaning your stepper motor?

Dave

[meatball]

Corin, YHM