Vauxhall Astra Mk5 1.6 1.8 Non SXi & SRi Sportex Exhaust Tailbox - Single 3. This well engineered performance exhaust fits as a direct replacement for the original part on all Astra MK5 Hatch 1.6 & 1.8 Non SXi & SRi models built in the date range 2005 -2010. The Sportex systems and tailboxes are manufactured from aluminised mild steel with polished T304 stainless steel tailpipes. The silencers are of the straight through absorption design giving a terrific deep exhaust note without intruding on in-car noise levels!All Sportex tailboxes and systems are now made on state on the art CNC bending machines so you can be sure of a perfect fit every time. When ordering a Sportex exhaust please send the following information with your order.