Both engine capacities were offered on the first VB Commodores which appeared in 1978. The 253 version was not available in the VK Commodore range, released in 1984, but continued in Holden WB commercials until their cessation in late 1984. In 1985, the special editions modified by Holden and their official after-market tuner, Peter Brock's HDT Special Vehicles, began introducing the 5. 0 L; 304. 3 cu in (4,987 cc) version of the engine, created to slip underneath the 5,000 cc (305 cu in) engine capacity cut-off in Group A touring car regulations, allowing Commodore competitors to run at a lower competition weight. This slight shrinking of the traditional Holden 308 saw the Group A Commodore's racing weight drop from 1,400 to 1,325 kg (3,086 to 2,921 lb). Due to the complex Group A regulations, this also allowed the racing cars to run bigger wheels and tyres without any drop in power. Indeed, the VK Commodore SS Group A was one of the fastest cars in the world of Group A racing when it hit the tracks in 1986.