Remark's axleback features two high-flow, straight-through muffler canisters, delivering a deep, sporty exhaust note. Perfect for those seeking a noticeable yet not overwhelming sound, it offers a balanced mix of exhaust and engine tones. The mild volume feels like a premium dealership performance part, providing an enhanced driving experience without being intrusive. Fitment Information Lexus IS300 4 Cyl Turbo RWD & AWD (2021, 2022, 2023, 2024, 2025) Lexus IS350 V6 RWD & AWD (2021, 2022, 2023, 2024, 2025) This does not fit 2014~2016 Lexus IS models due to factory bumper/diffuser differences. Specs & Features Tip Options:  Stainless Double Wall  Burnt Double Wall  Exhaust Type: Axle Back Exhaust Bolt on 2pc  Piping Diameter: 2.5inch, 16 gauge, mandrel bent pipe Tip Diameter: 4inch tip design slant style tips Piping Material: T304 stainless steel Tip Material: T304 stainless steel Muffler Material: T304 stainless steel, straight through design Weight: Optimal weight reduction from the factory mufflers Hardware: We have designed our flanges to fit factory midpipes correctly, due to that you will be:  You will be using factory Donut Gaskets  You will be using factory Spring Bolts This REMARK axleback includes two high flow, straight through design muffler canisters.  It produces a deep sporty exhaust note. This is ideal for those wanting an exhaust note without it being overbearing, and the primary sound heard from inside the car. There is a nice balance of a deep exhaust tone and the engine sound. We consider the sound volume quite mild, and feel it sounds like something you could purchase at the dealership as an optional performance part.  Both variants are Double Wall construction - the tip has an inner and outer layer of stainless steel. In general the appearance is more luxurious as the tip appears thicker and more pronounced. From the rear, the tips appear to have more of a shine due to the added surface area on the tips edge. Our kit is a simple bolt-on replacement for the OE mufflers. No modifications are required, does not trigger any check engine lights, and does not effect vehicle emissions. Installation is simple and straight forward. No cutting, no welding, and the factory exhaust can be reinstalled easily anytime. Full 304 Stainless Steel construction, and fully TIG welded by our expert craftsmen. Kit includes both right and left side, as well as required hardware for installation. This product fits different models of the Lexus IS. It will sound different based off the engine size and type. In general, the IS300 sounds quieter due to the nature of a 3.0L turbocharged engine. The larger 3.5L V6 models will generally sound louder.