Atmo 6.2-litre V8 fans can now score 407kW and 695Nm from any VFII Commodore SS or Gen-F HSV Clubsport thanks to a just-revealed Walkinshaw Performance W407 package.

Costing an additional $9990 above a 304kW SS or 340kW Clubsport and replacing the previous the W375 package, the W407 now gets – you guessed it – 407kW produced at 6250rpm in either Holden or HSV, which both also shift from 570Nm to 695Nm at 4950rpm.

Additions to the mighty LS3 include Walkinshaw Performance ceramic-coated headers, cold air intake, camshaft and valve spring upgrade and a dual-active catback exhaust.

Walkinshaw Commodore SS side

Walkinshaw Performance tags the W407 as its “best naturally aspirated package to date.”

“Utilising a Walkinshaw Performance spec camshaft and associated componentry provides more top end power and torque whilst maintaining road handling manners for your daily drive,” it further explained in a release.

W407 badge

“This results in greater efficiencies in power and economy and is finished with all in-fill panels and shrouds keeping with the original equipment look of the vehicle.”

Walkinshaw commodore SS rear

Walkinshaw Performance covers the Holden three-year/100,000km warranty for the engine, gearbox and differential – or the remainder thereof on used vehicles.