2.5" Catless Downpipe Exhaust for INFINITI G37 Q50 Q60 & Nissan 370Z 3.7L V6Upgrade your exhaust system with the SuncentAuto 2.5" Catless Downpipe Exhaust, designed for select INFINITI G37, Q50, Q60, and Nissan 370Z 3.7L V6 models. Built from durable T-304 stainless steel with a mirror-polished finish, this performance downpipe helps improve exhaust flow, reduce restriction, and deliver a deeper, more aggressive exhaust tone. Key Features & Benefits Durable T-304 Stainless Steel ConstructionT-304 stainless steel boasts excellent heat resistance and corrosion resistance, enabling it to withstand the high temperatures and moisture erosion of the exhaust system for extended periods. It is resistant to rust and cracking, extending its service life far beyond ordinary steel. Mirror Polished Finish The inner walls are mirror polished, resulting in an extremely smooth surface that significantly reduces frictional resistance in the exhaust airflow while enhancing oxidation resistance. Furthermore, it gives the exhaust system a clean, high-performance appearance, improving the visual appeal of the engine bay. Improved Exhaust FlowThe original three-way catalytic converter generates significant exhaust back pressure. This downpipe exhaust features a direct-flow design without a catalytic converter, allowing exhaust to flow more smoothly and improving engine breathing efficiency. Boosted Horsepower and TorqueWith reduced exhaust back pressure, the engine can "breathe" more efficiently at high RPMs, resulting in more complete combustion. In actual driving, this translates to noticeably lighter acceleration in the mid-to-high speed range, with a perceptible increase in wheel horsepower and torque. Reduces Exhaust Temperature (EGT) by 100°F to 200°F Catalytic converters accumulate a significant amount of heat. After removal, exhaust can be directly discharged, resulting in faster system cooling. Under full throttle or sustained high load conditions, exhaust gas temperature (EGT) drops by an average of 100–200°F. Improved Fuel Economy By reducing exhaust back pressure, the engine spends less energy pushing exhaust gases out during the exhaust stroke. This lowers pumping losses and improves thermal efficiency, resulting in a 3–5% fuel economy gain. A Powerful Exhaust Sound The catalytic converter-free design helps create a deeper, louder, and more performance-oriented exhaust note, ideal for drivers seeking a more responsive and exhilarating driving experience. Fitment (Compatible Vehicles) This 2.5" catless downpipe exhaust fits the following vehicles: Exact Fit for 3.7L V6 VQ37VHR Engine Models: 2008-2013 Infiniti G37 (Base, IPL, Journey, Sport, X AWD)2014-2015 Infiniti Q50 (Base, Premium, Sport)2014-2015 Infiniti Q60 (Base, IPL)2009-2018 Nissan 370Z (All Trims)Fits Coupe and Sedan variants. Please check your engine size before ordering.Why Choose SuncentAuto?Direct-install design: Perfectly matches compatible vehicle applications, including Q50 downpipes, Q60 downpipes, and G37 downpipe setups, supporting easier installation. 45-day risk-free returns: Not suitable? Not satisfied? Easy returns. Fast and free shipping within the US: No hidden fees. Customer support: Need help confirming compatibility or installation details? SuncentAuto's support team is always ready to assist you before and after sales. Promotion: New users enjoy a 10% discount on their first order, add to cart now! Join thousands of satisfied VQ owners: Don't take our word for it. Real buyers say "Perfect fit for my Q60" and praise "My 370Z sounds amazing now." Based on real owner experiences, it received a high score of 4.59/5. FAQs Will this downpipe fit my INFINITI G37?Yes. This downpipe is designed to fit 2008-2013 INFINITI G37 models with the 3.7L V6 engine – a direct G37 downpipe replacement.Does this fit the Nissan 370Z?Yes. It fits 2009-2018 Nissan 370Z models with the 3.7L V6 engine.Is this downpipe made of stainless steel?Yes. The product is made from T-304 stainless steel and features a mirror-polished surface for durability and appearance.What is the pipe diameter?The pipe diameter is 2.5 inches.Is this a catless downpipe?Yes. This is a catless downpipe exhaust, designed to reduce exhaust restriction and improve exhaust flow.Will this change the exhaust sound?Yes. A catless downpipe can make the exhaust tone louder, deeper, and more aggressive compared with a factory setup.Do I really need an ECU tune?Yes. Without a tune, the ECU will detect missing catalytic converters and trigger a CEL. A professional tuner clears the CEL and fully unlocks horsepower, torque, fuel economy, and EGT benefits.What’s the difference between a "Catless Downpipe" and a "Test Pipe"?They serve the same function—replacing the restrictive catalytic converter. This specific product is a 2.5" downpipe that maintains the stock routing for a direct bolt-on experience, designed to increase exhaust flow and reduce backpressure specifically for the VQ37VHR engine. Read More