No, that's incorrect. None of the Walkinshaw packages comply with emission requirements for Holden not to consider them an aftermarket and illegal modification. It's Walkinshaw's marketing and their race team alliance misleading people to believe they're Holden approved.
I was once shown a video on YouTube where they run up a "Walky" engine, on a engine dyno, to get their power rating claims
I assume it was a old disgruntled employee
It was basically just a long motor with no accessories attached and the header going to a straight pipe getting pumped cold air into the intake and tuned hard to get the peak power
So, if you take the "claimed" figures, put it in a engine bay, with accessories, a exhaust, and subtract the drive train loss from the transmission, diff, and wheels, and have a safe tune in it, the 500 ish kw claims drop down to +/- 400 ish kw, depending on if they are on a hub, or roller, and of course if the dyno is calibrated correctly for the run (happy dyno vs heart breaker)
I just tried googling for it, but no joy, there are though alot of stock Walky packages with shiny claimed kw badges getting dyno'd which show the "actual" power their expensive kits provide
Whilst all manufacturers give engine power, for a aftermarket supplier to promote their kits making ???kw on a engine dyno is a crock in my mind
But saying their "W507" package on a VF with a LSA gives you an extra 50 ish kw (20% ish more power) atw doesn't look as good, especially when that extra 50 kW (20%) could have easily achieved for much less coin, sans the shiny W507 badge
There's plenty of cars that have some smart basic mods pulling the same, or more power than the claims Walky make, and for alot less money than the Walky kits cost, not having a shiny badge on the boot doesn't seem to worry them one bit when they show the "Walky's" their tail lights
Q: Where do I get my over opinionated claims from?
A: Talking to tuners, watching cars run up on dynos with before and after mods, and at the drags (MPH and ET don't lie)
Meh, this is my last rant about Walky kits, and by no means did I mean to offend anyone who has one of their kits installed, I'm just telling it as I've seen it IRT bang for your buck with typical quality parts