370Z and G37 Y-Pipe Downpipe Exhaust Upgrade
A cleaner exhaust merge can make the VQ37 feel sharper, sound deeper, and move exhaust gases more smoothly through the mid-to-upper rpm range. This Flashark Y-pipe downpipe exhaust is built for listed Nissan 370Z Z34 and Infiniti G37 V36 RWD models with the naturally aspirated 3.7L VQ37VHR engine.
It is a good match for owners who want a stainless steel front exhaust upgrade without replacing the entire cat-back system. This part is best suited for performance, off-road, or track-focused builds where the driver accepts the normal tradeoffs of exhaust modification, including added sound, possible installation variables, and local emissions restrictions.
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
- Built for VQ37 exhaust flow: Helps reduce restriction after the front exhaust sections and supports smoother exhaust movement on the naturally aspirated VQ37VHR platform.
- Deeper exhaust tone: Adds a stronger, more aggressive sound profile compared with the factory Y-pipe, especially when paired with compatible test pipes, headers, or a cat-back exhaust.
- Stainless steel construction: Designed for heat resistance and durability in a performance exhaust environment.
- Welded flex section: Helps absorb movement in the exhaust path and can reduce stress on nearby flanges when installed correctly.
- Useful upgrade foundation: Works as part of a larger 370Z or G37 exhaust setup when matched with compatible front pipes, headers, or rear exhaust components.
- Installation hardware included: Comes with gaskets, nuts, and bolts to support installation.
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.
Delivery, Return, and Protection
DELIVERY: Free Shipping. Estimated in 3-5 Working Days.
Fast Shipping Policy: Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date.
Easy Return Policy: Every order comes with a 14-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.
Worry-Free Delivery Protection: Add Worry-Free Delivery at checkout — if it's lost, stolen, or damaged, you're 100% covered.
Fitment:
- 2009-2016 Nissan 370Z Z34 VQ37VHR
- 2008-2014 Infiniti G37 V36 VQ37VHR
- Fit with VG30DETT V6 Engine Models
(Does NOT Fit with G37 X/ AWD Models)
370Z and G37 Y-Pipe Downpipe FAQs
Q1: Does this Y-pipe fit a Nissan 370Z?
A1: Yes, this Y-pipe is listed for 2009-2016 Nissan 370Z Z34 models with the VQ37VHR 3.7L V6. Confirm your current exhaust setup before ordering, especially if your car already has headers, test pipes, or an aftermarket cat-back.
Q2: Does this fit an Infiniti G37 Sedan?
A2: Yes, this product is listed for 2009-2014 Infiniti G37 Sedan RWD models with the VQ37VHR 3.7L engine. It is not intended for G37X or AWD models.
Q3: Does this fit an Infiniti G37 Coupe?
A3: Yes, this product is listed for 2008-2013 Infiniti G37 Coupe RWD models with the VQ37VHR 3.7L V6. Check your drivetrain and exhaust layout before checkout.
Q4: Will this fit a G37X or AWD model?
A4: No. This Y-pipe is not designed for G37X or AWD models. AWD exhaust routing and clearance can differ from RWD models, so G37X buyers should not order this part unless fitment has been separately confirmed.
Q5: Is this a Y-pipe, downpipe, or test pipe?
A5: The base part is a Y-pipe exhaust section. Some owners use downpipe or test pipe wording when searching for front exhaust upgrades, and this listing may include selectable package options with additional exhaust sections. Confirm the selected variant before ordering.
Q6: Will this work with the stock cat-back exhaust?
A6: It is designed to fit the listed exhaust layout, but stock exhaust condition and previous modifications can affect alignment. If your car has an aftermarket cat-back, headers, test pipes, or custom exhaust work, check flange position and pipe diameter before installation.
Q7: How much horsepower can I expect?
A7: This Y-pipe 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. Gains from the Y-pipe alone are usually more modest than gains from a complete exhaust and tune combination.
Q8: Will this make my 370Z or G37 louder?
A8: Yes, most setups will sound deeper and more aggressive than stock. The final sound depends on your headers, catalytic converters or test pipes, resonators, mufflers, and cat-back exhaust.
Q9: Will this cause rasp or drone?
A9: Rasp and drone depend on the full exhaust combination. A Y-pipe can change tone, but test pipes, non-resonated sections, muffler design, and pipe diameter usually have a larger effect on cabin drone and high-rpm rasp.
Q10: Do I need a tune after installing this Y-pipe?
A10: A tune is not always required for a Y-pipe alone, but tuning may help optimize results when the Y-pipe is combined with headers, test pipes, intake upgrades, or a full cat-back exhaust. Follow your tuner’s advice for your exact setup.
Q11: Will this trigger a check engine light?
A11: A Y-pipe alone is less likely to cause a check engine light than parts that change catalytic converter or oxygen sensor behavior. However, CEL risk depends on the full exhaust setup, sensors, tune, and local inspection requirements.
Q12: Is this street legal?
A12: Street legality depends on local emissions rules and the full exhaust setup installed on the vehicle. This product is best treated as a performance, off-road, or track-use exhaust upgrade where permitted. Do not buy it if you need a guaranteed emissions-compliant replacement.
Q13: What comes in the package?
A13: The base package includes the Y-pipe, gaskets, nuts, and bolts. Larger package options may include additional exhaust parts depending on the selected variant, so check the option name before checkout.
Q14: Who should not buy this product?
A14: This product is not recommended for G37X or AWD owners, buyers who need a guaranteed street-legal or emissions-compliant part, drivers who want a quiet factory-style replacement, or anyone looking for a true turbo downpipe.