The 5.7L Stroker V8 motor found in some HSV’s utilised two catalytic converters in its exhaust system. This was different to anything seen before in the Commodore and Statesman line-up, which had up to that point used only one catalytic converter. The full twin cat exhaust system with extractors can be fitted to any VQ – VS 5.0L Statesman for enhanced sound and power when compared to the regular, single cat exhaust.

The 2.5? dual system is adequate for most applications, with a number of options depending on what noise level you’re chasing. Regardless of which one you choose, you can be guaranteed your Commodore transformed into the ultimate driving machine, with power and sound to match the V8 lurking beneath the bonnet!