Exhaust Race Pipe for Nissan 370Z Infiniti G37 (2008-2011)High Flow Exhaust Race Pipe for 2008 2011 Nissan 370Z (VQ37VHR Z34) Direct bolt on replacement for the restrictive factory catalytic converters, designed to reduce exhaust backpressure and lower exhaust gas temperatures in the VQ37VHR platform. The Stock Z34 Exhaust Bottleneck The factory exhaust system on the 2008 2011 Nissan 370Z and Infiniti G37 utilizes dense ceramic honeycomb catalytic converters that create significant exhaust backpressure.