PLM 3-Inch Catted Downpipe – 2023-2027 Toyota GR Corolla

PLM 3-Inch Catted Downpipe – 2023-2027 Toyota GR Corolla
SKU: PLM-GR-DP-GZEA14-CAT

Take your GR Corolla’s performance to the next level with the PLM 3-Inch Catted Downpipe, engineered to significantly improve exhaust flow, turbo efficiency, and overall engine response. Designed for enthusiasts who demand both reliability and measurable gains, this upgrade reduces backpressure while maintaining proper emissions functionality through a high-quality metallic catalytic converter.

Right off the turbo, the system transitions through a large-diameter outlet before flowing into smooth 3-inch mandrel-bent stainless tubing. The result is faster spool, improved throttle response, and stronger horsepower and torque throughout the powerband. Many customers see gains of 20+ horsepower with supporting modifications.

Constructed from 304 stainless steel and fully hand TIG welded, this downpipe is built to handle high heat and long-term use in both street and performance applications. Precision CNC bending ensures consistent internal diameter and optimal flow characteristics, while the factory-style mounting locations make installation straightforward.

The included 400-cell high-flow catalytic converter is designed to maintain efficiency while freeing up power, offering a great balance between performance, sound, and daily drivability. An integrated O2 sensor bung allows reuse of factory sensors for a clean installation.

If you want quicker turbo response, a more aggressive tone, and real performance improvements from your GR Corolla, this PLM downpipe delivers.

Features

• 4" outlet at turbo transition

• 3" stainless steel tubing

• Precision CNC mandrel bends

• 304 stainless steel construction

• High-flow 400-cell metallic catalytic converter

• EPA compliant (see notes below)

• O2 sensor bung

• Direct bolt-on to factory exhaust system

• Hand TIG welded

• Hardware included

• One year warranty

Performance

• Significant reduction in backpressure

• Faster turbo spool

• Improved throttle response

• Potential gains of 20+ horsepower with proper setup

Vehicle Fitment

• Toyota GR Corolla 2023–2025

• May not fit certain 2025 models equipped with automatic transmission

Installation Notes

• EPA compliant for OBD2 vehicles (1996+) except where CARB regulations apply.

• Always verify local and state emissions requirements before installation.

• An O2 sensor adapter may be required if the vehicle is not tuned.