Nice work man, and not a bad deal

But yep, I notice the same with my Civic (again, never had a car with an exhaust before) especially on a drive to Sydney - once it heats up get more of that snap, pop and crackle on up changes.

And don't know if it's just my car - but after it's warmed up at normal engine revs, it just needs one good rev and then she's on song the whole trip...