Flashark Catless Test Pipes for 2008–2013 Infiniti G37 3.7L V6 (VQ37VHR)

Catless G37 Test Pipes for 2008–2013 Infiniti G37 3.7L V6

These Flashark stainless steel test pipes replace the factory catalytic-converter sections between the exhaust manifolds and Y-pipe on the 2008–2013 Infiniti G37 with the 3.7L VQ37VHR V6. The paired, mandrel-bent pipes have pre-welded O2 sensor bungs and a mirror-polished finish. They also fit Nissan 370Z; check the linked full compatibility page for its exact applications before ordering.

Specifications

Key Features

• Paired catless test pipes: Replace the factory catalytic-converter sections between the exhaust manifolds and Y-pipe.
• Free-flowing 2.5 in. inlet and outlet: Reduces backpressure and increases scavenging velocity.
• Stainless steel construction: Built to resist heat, rust and long-term fatigue.
• Computerized mandrel bends: Helps avoid pinching and flow restriction through the curves.
• Full TIG-welded joints: Solid connections with no weak seams or flex points, cracking or leaks.
• CNC-machined, chrome-plated flanges: Designed for a precision-fit seal and corrosion resistance.
• Pre-welded O2 sensor bungs: Provide positions for the existing sensors without drilling the pipes.
• Direct bolt-on design: Included hardware permits installation without cutting or fabrication; confirm the vehicle's connections before ordering.
• Mirror-polished finish: Provides the original product's polished appearance.

These pipes are described as unlocking 5–10 whp on their own, or up to 8–15 whp when paired with a full exhaust system. They can create a louder, more aggressive exhaust note with possible high-RPM rasp; sound, drone and cabin odor vary with the rest of the vehicle's exhaust and tune.

What Is Included

• 2 stainless steel test pipes with pre-welded O2 sensor bungs
• 2 three-bolt flange gaskets
• 2 two-bolt flange gaskets
• 1 installation hardware kit

Considering a broader exhaust project? See Flashark's header and test-pipe combination kit. For a separate 370Z listing and its full compatibility details, see the related 370Z product page.

Check Before Ordering

• Confirm the exact year, model, 3.7L VQ37VHR engine, body style, drivetrain and exhaust connections. These pipes are not listed for 350Z, G35, 2.0T, 3.0T or different engine or exhaust layouts. For a Nissan 370Z, use the linked full compatibility listing to confirm the exact application.
• Compare the vehicle's exhaust-manifold and Y-pipe connections, flange patterns and O2 sensor locations with this pair before purchase, especially when other exhaust parts are aftermarket.
• These are catalytic-converter replacement test pipes, not turbocharger downpipes. A check engine light may occur; a compatible ECU tune may be required depending on the build, and a CEL-free result is not guaranteed. A tune is not included.
• For off-road or competition use only where permitted. Removing factory catalytic converters may be unlawful on street-driven vehicles and may cause an emissions-test failure. Check applicable local, state and federal requirements before purchase or installation.
• Professional installation is recommended if you lack exhaust-installation experience because access is limited and existing exhaust hardware may be seized.

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