Competition Series 4" Stainless Steel Catless Downpipe

The Evolution Racewerks Competition Series 4" Catless Downpipe is engineered for the 2020+ Toyota Supra 2.0L B46 engine, specifically for U.S. spec vehicles. This downpipe aims to eliminate exhaust flow restrictions, with the factory catalytic converter identified as a major bottleneck. By replacing it with a catless design, significant horsepower and torque gains are expected. Constructed from 100% 304 grade stainless steel with mandrel-bent piping, this downpipe is 100% TIG welded for superior quality and durability. A stainless steel flex section, similar to the factory component, is included to allow for proper exhaust movement and flexibility, preventing undue stress on exhaust components and the turbocharger. Installation is supported by the inclusion of all necessary hardware. The downpipe is compatible with both factory and aftermarket exhaust systems. Buyers should note that there are two bracket configurations depending on the vehicle's build date: one for 09/2020 and later (top and bottom brackets) and another for 08/2020 and earlier (top and side brackets). It is crucial to select the correct version for proper alignment. Performance expectations include average horsepower gains of 14-16 whp and average torque gains of 20 wtq (stock boost) up to over 24 wtq with a software upgrade. These gains can vary based on other vehicle modifications. The downpipe also promises improved throttle response and faster turbo spool-up times due to reduced exhaust flow restrictions and enhanced velocity. Optional O2 sensor bungs for wideband sensors and EGT sensor bungs for gauges are available.