2016 INFINITI Q50 Red Sport 400 with 19x9.5 Rays Engineering 57dr and 2016 INFINITI Q50 Red Sport 400 with 19x9.5 Rays Engineering 57dr and Diffuser Infiniti Q50 2017 2018 Facebook Facebook Compare 2018 Infiniti Q50 vs. 2017 Infiniti Q50 vs. 2016 Infiniti Q50. The Revel Medallion Touring S exhaust system is constructed from full SUS304 stainless steel for corrosion resistance & durability, and 1. 5mm wall thickness piping for increased strength and reduced resonation. The piping is also mandrel bent in order to retain the same piping diameter at the bends thus optimizing exhaust flow characteristings. 70 60mm Piping