The HX was introduced in July in 1976 and was basically a cosmetic upgrade on the HJ, although one major reason for the HX was the introduction of new anti-pollution requirements, Australian Design Rule 27A to lower exhaust emissions.

The cosmetic changes include a better grille treatment, bright colours, large GTS decals, colour-keyed bumpers, integrated spoiler options, and optional bonnet blackout made it the most distinctive of all four Monaros.

Features working suspension, a push button on the chassis is also included to open the bonnet. Detailed engine that looks just as good as the original. Note emission control equipment.