What Is a Reference Number, and How Does It Work? aFe POWER Takeda 2.5in 304 SS Axle Back Exhaust w Black Tips 17 19 Infiniti Q60 V6 3.0L (tt). This Takeda "muffler delete" axle back exhaust system delivers power, sound, and good looks. Constructed from mandrel bent stainless steel tubing, this system offers for dyno proven power gains and an aggressive, performance tuned sound. Installation Instructions Modular design utilizes stock mounting locations 100% TIG Welded for strength and durability Dual 4 1 2" Stainless Steel Exhaust Tips No Modifications Required This Part Fits: Year Make Model Submodel 2018 2022 INFINITI Q60 Luxe 2017 INFINITI Q60 Premium 2019 2022 INFINITI Q60 Pure 2017 2022 INFINITI Q60 Red Sport 400 2017 2018 INFINITI Q60 Sport