5. While the factory system was removed as a single component, the Corsa system bolts on with four pieces. Here, the muffler and flow tube to the resonator are slipped in place. They are only lightly tightened down at this point. Final tightening takes place after the entire system is installed and the tip located correctly. After the muffler and its flow tube are in place, the tailpipe extension and exhaust tip are installed.