Irmscher released details and photos on their tuning kit for the Opel Astra GTC. Limited to a total of 100 units, the Opel Astra GTC Turbo i 1400 packs a retuned engine and some styling tweaks. Under the hood sits a 1.4-liter four-cylinder unit producing 170 horsepower, so extra 30hp for improved performance. At the