---tab Description--- For enthusiasts looking for the highest possible exhaust flow from their vehicles, removing the factory catalytic converters in favor of 2.5" diameter race or "test" pipes is the most efficient upgrade available. What Does A Downpipe Do? The downpipe on your turbocharged vehicle is directing the exhaust gases out of the turbine housing into the exhaust system. An aftermarket downpipe will typically be larger in diameter and either uses a high-flowing catalytic converter or remove the catalytic converter altogether. By removing the factory downpipe and replacing it with a high flowing unit you are allowing the turbo to more efficiently move gases away from the turbine which creates more power. Since the factory restrictions are now gone you can increase the boost on the vehicle as the factory downpipe is a choking point for performance. Specifications Brand Name SPELAB Application Downpipe Exhaust Material Stainless Steel Surface Mirror Polish Type 2.5 Inch Downpipe for Nissan 2009+ 370z Infiniti G37 ---tab Fitment--- All Nissan 370Z Models 2008-2018 All Infiniti G37 Models (Coupe and Sedan) All Infiniti Q50/Q60 Models with 3.7L Engine (does not fit 2.0 or 3.0t models) ---tab Shipping & Returns--- Fast Shipping Policy Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. Click for Shipping Policy Easy Return Policy Every order comes with a 14-day free return, which means you don't have to pay for a return slip. Click for Return Policy