Hushkitted? No, the majority of Rynoair's 737-200 are not hushkitted. Most of those that are hushkitted can't often get above FL300 in summer when the temp's high at altitude and the loads high; I know, I've tried in the past!
You only have to listen to them trying to get off on R21 at PIK when they have to due to x-winds - it's a very noisy affair.
Oh! so this topic isn't about exceeding 250knots in class G airspace then?