The midpipe and flanges are machined from SS304 aircraft-grade stainless steel and are tig welded in house to deliver the best quality. These mid pipes will provide power gains and a much more aggressive exhaust note which sounds truly amazing. Will fit the following models perfectly. Professional installation is recommended as some exhausts sit slightly different from others. The car would need to be tuned with these on or a lambda spacer used as both lambda sensors are at the top of the downpipe.