Unleash the full potential of your VQ37-powered Nissan or Infiniti with the Untd. Performance Resonated Testpipe. Designed to replace the restrictive factory catalytic converters, this performance-focused upgrade delivers significant gains in exhaust flow, sound, and throttle response—while incorporating a resonator to smooth out tone and reduce unwanted rasp. Perfect for street-driven builds or track machines, this testpipe strikes a bold balance between raw performance and refined sound.