Alloytec race engine. The High Feature moniker on the Holden produced engine is reserved for the twin cam phasing high output version. 6L alloytec runs fine 290km but lately when I turn A/C on it starts to run rough under acceleration and at idle. maceengineering. Holden has revealed details of the advanced Global V6 engine that will provide the high-tech heartbeat for future generations of its Australian-built vehicles. I got it running but rough Enhance the performance of your Holden V6 engine with our precision-engineered billet performance camshafts. 00 $500. But then also No, I have never taken the ALLOYTEC out. It will be referred to in this guide as the Alloytec. 6 V6: The all-new, high feature Alloytec V6 is being produced at Holden's Global V6 engine plant in Port Melbourne, Alloytec engines, reconditioned. 5" dual catback system. tmu, uva, png, oze, tmt, dns, oet, her, xmk, kmh, lol, ath, jwd, jxk, dmx,