Thanks guys, I will pass this on. Its amazing they can nearly double the horsepower (or as Nath says, probably halve it) with such simple changes (or at least they said they doubled the horsepower.
I would really like to put a few older models on a 'dyno' and really see how much they lied
Plus, as Greg said, we all know what happened to holden's quoted power/torque levels around the time of the HJ/LH and HX/LX when they went from no filter, fan or exhaust to fully assembled.
The quoted HP fell off a cliff
