The installation may have smoothed the Zed's gruff engine a little, but it's still no sewing machine. The grumble is still there at lower revs and there's still a bit of thrashiness as you really wring it out. This time around, of course, there's also a very satisfying nose-blow noise when you abandon the noise pedal and the blow-off valves dump their boost.

The all-up cost is still in the air, but take it as read that you won't be getting much change back from about $15,000. That's partly because APS won't be offering the thing as a spanner-it-up-at-home kit. The only way to get hold of it will be as a turn-key installation, including all fitting, tuning and an engineer's certificate to prove to Plod that it still meets all relevant noise and emissions targets. That's purely because Luxon knows the kind of bloke shelling out for a modded 350Z sure as hell doesn't want any legal hassles - quite literally - down the road. Turn a perfectly legal set of wheels into a liability by spending a large amount of cash thereon? Well, that makes no real sense to us, either.

Projected annual sales volumes are 25-30 a year in Australia, so it could never justify the $380,000 to date that APS has tipped into the development and testing of the set-up.

But the potentially hundreds of installations our Stateside friends might be interested in? Now that, speed freaks, is a different story entirely.