Frequently Bought Together
Y Pipe Downpipe Exhaust for 2008-2016 Nissan 370Z Z34 / Infiniti G37 V36 VQ37VHR 3.7L
1 Item · Y Pipe Only · SKU: FLES08381
$154.99
Product Specifications
370Z and G37 Y-Pipe Downpipe Exhaust Upgrade
The factory Y-pipe on the VQ37VHR is built around emissions compliance and cabin comfort — not flow. Its cramped merge design restricts exhaust velocity right where both cylinder banks come together, blunting mid-range response and muffling the V6 tone this platform was born to deliver.
This Flashark 2.5-inch-to-3-inch stainless Y-pipe replaces that restrictive merge with a smoother, larger-volume section that helps exhaust gases exit faster through the mid-to-upper RPM range. It adds a welded flex joint for vibration isolation and ships with gaskets and hardware for a bolt-on install. Expect a deeper, more aggressive VQ37 tone and sharper throttle response — especially when paired with test pipes, headers, or a cat-back system. Estimated 10-15 HP with ECU tune as part of a full exhaust build.
OFF-ROAD USE ONLY
This product is designed for off-road and track use only. Removing or bypassing factory catalytic converters violates the federal Clean Air Act (42 U.S.C. § 7401) and may result in fines, failed emissions inspections, or registration denial. Some combo variants include test pipes that replace catalytic converters — these are NOT legal for street use in emissions-regulated states. Check your local regulations before purchasing. By ordering, you accept full responsibility for compliance.
Specifications
| Brand | Flashark |
| Product Type | Y-pipe downpipe exhaust section |
| Material | Stainless steel |
| Finish | Polished stainless finish |
| Inlet Diameter | 2.50 inches |
| Outlet Diameter | 3.00 inches |
| Piping | 2.50 inch piping with welded flex section |
| Engine Platform | VQ37VHR 3.7L naturally aspirated V6 |
| Estimated Gain | Supports an estimated 10-15 HP and 5-10 ft-lbs of torque depending on the full exhaust setup, tune, engine condition, and installation quality. |
| Included Items | Y-pipe, gaskets, nuts, and bolts |
Key Features
Smoother VQ37 exhaust merge — Replaces the factory Y-pipe's cramped junction with a freer-flowing 2.5"→3.0" design that reduces back-pressure at the critical merge point where both cylinder banks converge
Deeper, more aggressive exhaust tone — Opens up the VQ37VHR's natural V6 character; sound level depends on your full exhaust configuration (test pipes, cat-back, resonators)
T-304 stainless construction — High-grade stainless built for sustained exhaust heat, corrosion resistance, and long service life
Polished stainless finish — Clean appearance under the car; resists surface discoloration from heat cycling better than raw or painted finishes
Welded flex section — Absorbs drivetrain and chassis movement to reduce flange stress and prevent fatigue cracks at the merge welds
2.5" inlets / 3.0" outlet — Matches factory front pipe outlet diameter (2.5") while stepping up to 3.0" at the merge for improved downstream flow velocity
Bolt-on installation — Direct-fit replacement for the factory Y-pipe section on RWD 370Z and G37 models; includes gaskets, nuts, and bolts
Foundation for full exhaust build — Pairs with Flashark test pipes, headers, and cat-back systems for a complete VQ37VHR exhaust upgrade path
Built for Better Flow and Sound
The Y-pipe is one of the main merge points in the 370Z and G37 exhaust path. It brings exhaust flow from both sides of the VQ37 engine together before the system continues toward the rear exhaust section.
Replacing the factory-style Y-pipe with a freer-flowing stainless section can help sharpen throttle response, deepen the exhaust tone, and support better pull through the upper rpm range. This is not a turbo downpipe upgrade because the 370Z and G37 VQ37VHR platform is naturally aspirated.
Complete Your Performance Build: For the ultimate sound and power gains, pair this high-flow Y-pipe with our 3-Inch Single Tip Cat-Back Exhaust for 2009-2020 Nissan 370Z.
Who This 370Z and G37 Y-Pipe Is Best For
This Y-pipe downpipe exhaust is best for Nissan 370Z and Infiniti G37 RWD owners who want a sharper exhaust response, a deeper VQ37 tone, and a stronger foundation for future exhaust upgrades. It works well for drivers who are building around better exhaust flow rather than looking for a quiet factory-style replacement.
- 370Z Z34 owners: Drivers with listed 2009-2016 Nissan 370Z models who want a freer-flowing Y-pipe section for the VQ37VHR platform.
- G37 RWD Coupe or Sedan owners: Infiniti G37 owners with listed RWD fitment who want better exhaust merge flow without replacing every exhaust section at once.
- Performance-focused builds: A good match for owners pairing the Y-pipe with compatible headers, test pipes, or a cat-back exhaust for a fuller VQ37 exhaust setup.
- Drivers who want more sound: Best for users who prefer a deeper, more noticeable exhaust tone compared with the factory Y-pipe.
- Off-road or track-use buyers: Suitable for performance builds where local rules allow exhaust modifications and the owner understands emissions limitations.
This part is not the right choice for G37X or AWD models, buyers who need a guaranteed emissions-compliant replacement, or drivers who want the quietest possible factory-style exhaust. If your car already has custom exhaust work, confirm flange location, pipe diameter, and drivetrain fitment before ordering.
Stock Y-Pipe vs Flashark Y-Pipe
| Area | Factory Y-Pipe | Flashark Y-Pipe |
|---|---|---|
| Exhaust Flow | Designed around factory comfort and emissions priorities | Designed to reduce restriction and support smoother exhaust movement |
| Sound | Quieter and more restrained | Deeper and more noticeable, depending on the full exhaust setup |
| Material | Factory material varies by vehicle age and condition | Stainless steel tubing with polished finish |
| Performance Support | Limited by the stock exhaust merge design | Supports an estimated 10-15 HP and 5-10 ft-lbs of torque with the right setup |
| Best Use | Factory-style comfort and replacement use | Performance, off-road, track, or modified builds where permitted |
How This Y-Pipe Fits the VQ37 Exhaust Path
Many 370Z and G37 owners search for this part using terms like Y-pipe, downpipe, test pipe, front pipe, or Z34 Y-pipe exhaust. On this platform, the Y-pipe is the merge section that connects the front exhaust path to the rear exhaust system.
This listing includes selectable package options, so the exact parts you receive depend on the variant chosen before checkout. The base Y-pipe option includes the Y-pipe section with gaskets and hardware. If you need headers, test pipes, or a full cat-back setup, select the matching package carefully and confirm the product images and option name before ordering.
What Is Included
- 1 x Y-pipe exhaust section
- Gaskets
- Nuts and bolts
- Selected variant components if you choose a larger package option
Professional installation is recommended. Exhaust age, rusted factory hardware, previous modifications, and flange alignment can affect installation time.
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.
