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Flashark Catless Test Pipes for 2008-2013 Infiniti G37 3.7L V6 — Stainless Steel, Mirror Polished, Bolt-On Fit
Push more out of your VQ37VHR. These Flashark catless downpipe test pipes replace your factory catalytic converters with free-flowing 2.5" Stainless steel pipes, reducing exhaust backpressure and unlocking 5–10 whp on their own — or up to 8–15 whp when paired with a full exhaust system.
Built to last stainless steel, computerized mandrel bends, and full TIG-welded joints. Every connection is sealed and solid. No flex points, no cracking, no leaks.
⚠️ For off-road / track use only. Removing catalytic converters is not legal for street use in California or states with emissions testing. Check your local laws before installing.
Key Features
- Free-flowing 2.5" inlet & outlet — reduces backpressure, increases scavenging velocity
- Stainless steel — resists heat, rust, and long-term fatigue
- Computerized mandrel bends — no pinching, no flow restriction through every curve
- Full TIG-welded joints — no weak seams, no cracking under high heat and vibration
- CNC-machined flanges — chrome-plated for corrosion resistance, precision-fit seal
- Pre-welded O2 sensor bungs — plug your existing sensors straight in, no drilling
- Direct bolt-on installation — all hardware included, no cutting or fabrication required
- Mirror-polished finish — clean look under the hood if you ever want to show it off
Delivery:
Free Shipping
Shipping Time: Estimated at 3-5 Working Days
Warranty:
Duration of Warranty: 1-Year Warranty
Often, after purchasing the Infiniti G37 Z34 Downpipe Exhaust, customers will also purchase other items. Come on, check out Flashark's all-in-one kits and modify your car to your heart's content!
| Year | Make | Model | Engine |
|---|---|---|---|
| 2008 | Infiniti | G37 | 3.7L V6 VQ37VHR |
| 2009 | Infiniti | G37 | 3.7L V6 VQ37VHR |
| 2010 | Infiniti | G37 | 3.7L V6 VQ37VHR |
| 2011 | Infiniti | G37 | 3.7L V6 VQ37VHR |
| 2012 | Infiniti | G37 | 3.7L V6 VQ37VHR |
| 2013 | Infiniti | G37 | 3.7L V6 VQ37VHR |
Q: What vehicles do these catless test pipes fit?
A: These test pipes fit 2008–2013 Infiniti G37 and 2009–2018 Nissan 370Z models equipped with the 3.7L VQ37VHR V6 engine. They do NOT fit 350Z, G35, 2.0T, 3.0T, or vehicles with a different engine or exhaust layout. Please confirm your year, model, and engine before ordering.
Q: Are these downpipes or test pipes?
A: These are catless test pipes designed for naturally aspirated VQ37VHR applications. They replace the factory catalytic converters between the exhaust manifolds and Y-pipe, helping reduce exhaust restriction. They are not turbocharger downpipes.
Q: Will these test pipes cause a check engine light?
A: A check engine light may occur because the factory catalytic converters are removed and the rear O2 sensors can detect reduced catalyst efficiency. A compatible ECU tune may be required depending on your build. A tune is not included with this product, and a CEL-free result cannot be guaranteed.
Q: Will these test pipes make my G37 or 370Z louder?
A: Yes. Removing the factory catalytic converters typically creates a louder, more aggressive exhaust note and increases high-RPM rasp. Sound level, drone, and cabin odor will vary based on your headers, Y-pipe, cat-back exhaust, tune, and overall vehicle setup.
Q: Do I need a tune after installing these test pipes?
A: The pipes are designed as a direct bolt-on exhaust component, but tuning is recommended for modified vehicles that want to optimize performance and address potential catalyst-efficiency codes. Always use a tune designed for your exact vehicle and modification setup.
Q: Are catless test pipes street legal?
A: No. Removing or modifying factory catalytic converters is not legal for street-driven vehicles in many locations and may cause an emissions-test failure. These catless test pipes are intended for off-road or competition use only where permitted. Check applicable local, state, and federal regulations before purchase or installation.
Q: Is installation difficult?
A: Installation requires access to the factory catalytic-converter area, removal and reinstallation of O2 sensors, and proper sealing of the exhaust connections. Because space is limited and exhaust hardware may be seized from heat cycles, professional installation is recommended if you do not have exhaust-installation experience.
Q: What should I check before ordering?
A: Confirm that your vehicle is a 2008–2013 Infiniti G37 or 2009–2018 Nissan 370Z with the 3.7L VQ37VHR V6. Also confirm your local emissions requirements and make sure a catless exhaust setup is suitable for your intended use.
Fast Shipping Policy
Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. Click for Shipping Policy
Easy Return Policy
Every order comes with a 30-day free return, provided the item is brand new, uninstalled, and in its original packaging. We cover return shipping for quality issues. Refunds are processed within 3-5 business days. Click for Return Policy
Worry-Free Delivery Protection
Add Worry-Free Delivery at checkout — if it's lost, stolen, or damaged, you're 100% covered. Click for Worry-Free Delivery Protection