Many years ago I bought a stainless steel cat back exhaust set up for the C5. The same system sold under several names eg NXT, Granatelli etc & I believe was made in China. At the same time I bought a 'recommended' X pipe made in the US. Neither of these items have deteriorated but the quality of tubing, welding etc is superb on the Chinese cat back, not so on the X pipe made by B*****i. The welds did the job but looked like they'd been done by an early trainee, the alignment was also way off, so much so I received a replacement after my complaint. Sadly this was little better, very disappointing.