Nameless Performance Catback Exhaust, 4-Inch Mufflers and Double-Wall Tips | SUCB22WRX-4MU-40SDW

This Nameless Performance catback is the specific 2022+ WRX configuration with a four-inch muffler on each axle-back branch and quad four-inch double-wall tips. MPN SUCB22WRX-4MU-40SDW distinguishes it from Nameless muffler-delete, smaller-muffler, and alternate-tip systems. It replaces the exhaust downstream of the factory J-pipe, retaining emissions hardware and oxygen-sensor locations. The mufflers temper volume compared with delete configurations, but cabin resonance and overall loudness still depend on engine speed and any upstream exhaust changes. A catback alone does not require an ECU calibration. Installation is bolt-on, but the long system should be aligned from front to rear before final tightening so the four tips sit evenly and do not contact the bumper openings.