Yes, that's right. And you change both cam wheels; the one on each camshaft. You can buy them in a kit of two from various places (Graves is one). They are not that exxy either ($150ish, from memory, for the Graves). I've got some sitting at home, waiting for inspiration.
Fuck knows. That really is the million dollar question, and that's why my cam wheels are still sitting, unopened, on the bench in the workshop. Many, many hours googling has revealed a few choice details about OEM measurements, but still nowhere near enough to risk my engine.....
Not as I understand it. Certainly not enough to justify all the additional expense (you need valve springs etc too) plus the higher wear rates and significantly higher failure risk. But I guess if you are after every last pony, then you'd do this too. I wouldn't bother for club racing.
AFAIK just changing the filter to an aftermarket one. That's certainly all I've heard about. Anyone else know any different?
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