He says the first cars will arrive in dealerships late next month.
The Clubsport will kick off the range with an $86,990 price tag on the manual version, and the Maloo starts at $80,990. Lamb says key models in the range will be priced lower than their predecessors, despite higher specifications.
As with all HSV product, the option list is extensive, ranging from add-ons like side blind warnings, through to go-fast goodies such as propane injection and the company's clever bi-modal exhaust system which makes the big six-pot brake callipers a $4890 box worth ticking.
But it's what's coming standard on other models that'll get HSV nuts most excited - the R8s will have the 325kW engine, 20-inch forged alloys and leather seats, plus the stylish hard tonneau cover for the Maloo R8, and the Senator Signature will have side blind alerts and 20-inch forged alloys in dark stainless.
The MY12.5 range will wear 25th Anniversary bling - including build plate, dash ID plate and sills. Even HSV's excellent driver interface, which includes the cool ability to time laps at major race circuits in Australia and New Zealand, will have an anniversary start-up screen.
"Twenty-five years is an important milestone for our company," said HSV managing director Phil Harding. "From a customer perspective, however, it is the product that matters so we have been working hard to deliver even more value across our range."