Commodore

Not long ago, we brought you details on Walkinshaw Performance’s new W375 kit for the HSV’s Gen-F range of muscle sedans, which focused on naturally aspirated power. Walkinshaw is now back with two new supercharged kits for the HSVs as well as the regular Holden Commodore SS-V, to be sold here as the 2014 Chevrolet SS, and this time the power levels rate as high as 667 horsepower. The first kit, the W457, is designed for the Commodore SS-V, which in standard tune generates just 362 horsepower from its 6.0-liter V-8. With Walkinshaw’s supercharger kit installed, output now...