I've alfa romeo mito tb 120hp and I have 2 issues: 1)Will I get some hp increase and seem? 2) will the check motor mild open If I place aftermarket downpipe? I feel if I alter it my motor vehicle might be decat proper? But precisely what is a downpipe, https://garrettfmua85285.blogars.com/28282488/enhanced-performance-with-rs6-c8-downpipes-a-comprehensive-guide