The VQ37VHR engine found in the Infiniti G37 and Nissan 370Z produces one of the best natural exhaust sounds of any production V6. With the right exhaust system, that sound goes from great to absolutely incredible. Here is a guide to your options.
Axle-Back Exhaust
An axle-back system replaces only the muffler section — from the rear axle back. It is the easiest exhaust mod to install (typically 30–60 minutes) and immediately transforms the sound character. The VQ37 becomes noticeably deeper and more aggressive at idle and under acceleration, without being obnoxious at highway speeds. This is the most popular starting point for G37 and 370Z owners.
Catback Exhaust
A catback system replaces everything from the catalytic converters back — the mid-pipe, X-pipe or Y-pipe, and mufflers. More exhaust flow means a louder, more aggressive sound AND modest power gains at the top of the rev range. The VQ37 really opens up with a full catback — the high-RPM note is addictive. Installation takes 1–3 hours and most systems are bolt-on with no fabrication needed.
Test Pipes / Catless Mid-Pipe
Test pipes remove the catalytic converters entirely for maximum flow and the loudest possible VQ37 exhaust note. Combined with a catback system, this is the full exhaust treatment — the sound is raw, loud, and unmistakably VQ. Important: test pipes are for off-road and track use only. An O2 sensor spacer/defouler is typically needed to prevent a check engine light.
Headers
Long-tube headers replace the factory exhaust manifolds and are the most involved exhaust upgrade — but also the most rewarding for performance. Headers improve exhaust scavenging for real mid-range and top-end power gains. Professional installation is strongly recommended. This is typically a late-stage build mod after other upgrades are in place.
What Does the VQ37VHR Sound Like With a Catback?
At idle: a deeper, more authoritative rumble compared to stock. Under light throttle: refined and smooth. At wide-open throttle above 4,000 RPM: one of the best sounds in the sports car world — a high-revving V6 scream that builds to redline. It is genuinely one of the reasons people buy these cars.
Shop G37 and 370Z Exhaust at MyVQParts
Browse exhaust systems for the Infiniti G37 and Nissan 370Z at MyVQParts. Questions about fitment or sound levels? Email support@myvqparts.com — we know these platforms inside and out.
