The Scorpion Car Exhaust Secondary Cat Replacement – Vauxhall Astra GTC 1.6 Turbo 2009 – 2015 is part of the latest Scorpion Exhausts collection. SECONDARY CAT REPLACEMENT A catalyst is a key component in emission control. It is also the most restrictive component of an exhaust. Our sports catalysts increase the gas flow while maintaining filtration rates. Our de-cats simply replace the catalyst altogether for the ultimate flow rate. Pipe Diameter – 63.5mm Tailpipe – N/A Red Power Valve – No Key Features / Points: Improved Performance Superior Engineering Lifetime Warranty Fitting Instructions Included British Manufactured View all Scorpion Exhausts . View all Parts & Spares . PLEASE NOTE: Most Scorpion Exhausts are standard Stock and will be with you in a few days but some are a bespoke item manufactured to order. Although we have stated estimated delivery times in this listing these are for guidance purposes only. Due to high order volumes there may sometimes be a delay in the production of your exhaust. If you require an exhaust for a specific date please order well in advance to ensure that you receive it in good time. We appreciate your understanding in this matter.