I've alfa romeo mito tb 120hp and I've two concerns: one)Will I get some hp improve and sound? two) will the Examine engine light-weight open If I put aftermarket downpipe? I feel if I modify it my auto will be decat ideal? , a large-flow downpipe can raise the motor https://angelovbhm28528.gigswiki.com/4960674/maximizing_performance_the_ultimate_guide_to_downpipes_for_mercedes_benz_gle_63_amg