Can someone measure the header diameter on an S2R1000 for me please?

[gatorgrizz27]

Hey guys, building an exhaust for a customer's S2R1000, he won't be dropping it off until next week but I wanted to make sure I order the right diameter tubing. Can someone with a caliper or micrometer and an S2R1000 measure the header diameters before they go into the udder?

Thanks a lot.

[brad black]

pretty sure it's 40mm, but I don't have one at hand.

[gatorgrizz27]

That's the only dimension I could find online, but couldn't verify it. Thanks for the help!

[He Man]

i can verify later tonight, last i remember it was 40mm OD.

[Speeddog]

39.62-40.39, depending on where you measure it, IE a bit out of round.

Oddly enough, that averages to 40.