Catless Test Pipes for 2008–2013 Infiniti G37 & 2009–2018 Nissan 370Z 3.7L V6
Give your VQ37VHR exhaust a freer path and a more aggressive note with this two-piece stainless-steel test-pipe kit. It replaces the factory catalytic-converter section on listed 2008–2013 Infiniti G37 and 2009–2018 Nissan 370Z 3.7L V6 configurations. Use the detailed fitment below to match your specific vehicle before choosing a style.
Specifications
| Specification |
Details |
| Product type |
Catless test pipes; pair |
| Replacement section |
Factory catalytic-converter section |
| Tubing |
2.5-inch inlet and outlet |
| Material |
16-gauge T-304 stainless steel |
| Construction |
Mandrel-bent tubing; TIG-welded joints; CNC-machined flanges |
| Sensor provision |
Pre-welded O2 sensor bungs |
Key Features
-
Straight-through catless design: Replaces the factory catalyst section for freer exhaust flow and a more aggressive exhaust note.
-
Vehicle-specific routing and flanges: Built around the listed G37 and 370Z 3.7L exhaust path; check your exact connections.
-
Mandrel-bent tubing: Maintains the tube path through its bends.
-
TIG-welded joints and CNC-machined flanges: Provide the construction described for this kit.
-
Chrome-plated flanges: The product feature field describes this finish for corrosion resistance.
-
Pre-welded O2 sensor bungs: Provide sensor mounting locations on the pipes.
What Is Included
- 2 stainless-steel catless test pipes with pre-welded O2 sensor bungs
- 2 heavy-duty 3-bolt gaskets
- 2 precision-fit 2-bolt gaskets
- 10 installation hardware pieces
Check Before Ordering
- Match your year, model, trim, body style, drive type, 3.7L engine, and current exhaust connections to the table above. The current fitment tab excludes Nissan 350Z, Infiniti G35, 2.5L, and 3.5L applications.
- Select your style carefully. Header, Y-pipe, catalytic-converter, and cat-back combinations contain different components; verify each selected combination and its fitment before purchase.
- These test pipes replace the factory catalytic converters. The current product guidance limits use to off-road or track applications where permitted; check applicable rules before ordering.
- A check-engine light may occur after installation; results vary by vehicle, tune, and O2 sensor configuration.
- Professional installation is recommended because of the catalyst location and heat-cycled hardware.
Warranty: Duration of Warranty: Permanent Warranty
Product image:
You will receive the items shown in the product image above.
For a matching header and test-pipe combination, see Flashark’s all-in-one kit and confirm its vehicle and component fitment.

Shipping & Returns
Free U.S. Shipping: Orders are typically processed within 1–2 business days and delivered within 7–9 business days. Additional charges may apply to remote areas.
30-Day Returns: Unopened and unused items in their original packaging may be returned within 30 days of receipt. Return shipping is covered for verified quality issues.
Worry-Free Delivery: Optional protection against eligible loss, theft, delay, or transit damage is available at checkout.