The JRspec cast iron collector is designed for the 1.8T engine with a K03 turbo flange, suitable for VW Passat and Audi A4/A6 models. Constructed from high-quality cast iron, this collector features enlarged channels to enhance exhaust gas flow. The annealing process ensures durability by preventing cracking. The collector flanges are precisely arranged, making it ready for immediate installation.

Please note that longer mounting pins are required for installation and are not included in the set.