Exhaust Downpipe · SKU 701807500853
EXHAUST DOWNPIPE TURBO PIPE FOR NISSAN 03-09 350Z Z33 G35 VQ Stainless Steel
A 2.5 inch mandrel bent T-304 stainless steel exhaust downpipe with CNC machined flanges for the 2003-2009 Nissan 350Z and 2003-2008 Infiniti G35 sedan and 2003-2007 Infiniti G35 coupe. It replaces the factory downpipe between the turbo outlet and the catalytic converter and ships as a single piece with included hardware. Fitment is year and model specific and does not cover vehicles with modified or non-OEM turbo setups.
- MaterialT-304 Stainless Steel
- Size2.5 inch inlet and outlet
- FlangeCNC machined
- WeldingTIG double side welded
What You Get
Key Benefits
- 2.5 inch mandrel bent T-304 stainless steel pipe reduces exhaust back pressure and improves turbine spool-up
- CNC machined flanges ensure a flat sealing face for a leak-free connection at the turbo joint
- TIG welded construction provides strong, consistent weld seams that resist heat cracking
- Includes all hardware shown in the product image for direct bolt-on installation
- Non-resonated design increases exhaust flow and delivers measurable gains in horsepower and torque
Why Buyers Switch
Problems It Solves
- Factory downpipes restrict exhaust flow and limit peak horsepower on high-output engines
- Mild steel or poorly welded aftermarket pipes fail under sustained high exhaust temperatures
- Flanges that are not CNC machined leak at the turbo joint under boost and load
- Universal or cut-to-fit pipes require welding and modification, increasing installation time and cost
Where It Is Used
Application Scenarios
- Distributors stocking race-focused exhaust parts for Japanese sports car enthusiasts
- Tuning shops building high-output engine packages where exhaust flow is a limiting factor
- Online sellers needing a vehicle-specific performance part with clear fitment and visible hardware
Buyers
Who It Is For
- Performance parts distributors buying race-oriented exhaust components by the pallet
- Online auto parts sellers requiring a photographed, fitment-verified part for e-commerce
Construction
Technical Features
- Single piece 2.5 inch mandrel bent T-304 stainless steel downpipe with pre-fitted CNC machined flanges
- TIG double side welded joints for structural integrity and leak resistance
- Includes all hardware shown in the product image for direct bolt-on installation
- Non-resonated design with O2 sensor bungs for tuning and diagnostics
- Bolt-on geometry matches the factory routing and does not require modifications
Data
Specifications
| Material | T-304 Stainless Steel |
|---|---|
| Size | 2.5 inch inlet and outlet |
| Flange | CNC machined |
| Welding | TIG double side welded |
| Bending | Mandrel bent |
| Fitment | 2003-2009 Nissan 350Z, 2003-2008 Infiniti G35 Sedan, 2003-2007 Infiniti G35 Coupe |
| Exclusion | Not intended for street use; for racing and competition only |
Material
Materials
- T-304 stainless steel tube
- CNC machined steel flanges
- Included hardware (bolts, washers, nuts)
Manufacturing
How It Is Made
Tube bending to match factory downpipe routing using mandrel bending technique
Flange machining on CNC for precise bolt hole alignment and flat sealing face
TIG welding of flanges to tube with double side seam for strength
Final inspection of weld seams and flange flatness before packaging
Hardware assembly and verification against the product image before shipping
Checks
Quality Control
- Flange bolt pattern and sealing face checked before welding
- Weld seams inspected for pinholes and incomplete fusion along the full joint
- Surface checked for handling marks, scratches, and coating defects before packing
- Final fit check against a known good flange pattern before shipping
Private Label
Customisation Options
- Private label packaging and barcode labels on request
- Bulk cartons available for container orders instead of individual retail boxes
Comparison
Compared With The Alternatives
| Factory downpipe | The stock pipe includes emissions equipment and restricts flow; this one removes that restriction for performance gains |
|---|---|
| Mild steel aftermarket downpipe | Mild steel is cheaper but fails under high heat and corrodes quickly; T-304 stainless resists heat and oxidation |
| Universal cut-to-fit pipe | A universal pipe requires cutting, welding, and fitting; this one bolts on without modification |
Installation
Use Guide
- Confirm the vehicle is a 2003-2009 Nissan 350Z or 2003-2008 G35 sedan / 2003-2007 G35 coupe
- Let the engine and exhaust cool completely before removing the factory downpipe
- Replace the turbo outlet gasket rather than reusing the old one
- Torque flange bolts evenly in a cross pattern to maintain sealing face flatness
- Recheck flange torque after the first heat cycle to prevent leaks
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Answers
Questions About This Part
Will this fit a 2010 Nissan 350Z?
No. The part covers 2003-2009 Nissan 350Z and is not designed for 2010 or later models.
What size is the pipe?
2.5 inch inlet and outlet. It replaces the factory downpipe from the turbo outlet.
Is the flange included or do I need to weld one on?
Yes, the CNC machined flange is already fitted. The pipe ships as one piece with all hardware included.
What material is used and why does it matter?
T-304 stainless steel. It resists high heat and oxidation better than mild steel and maintains strength under sustained engine loads.
What is included in the package?
One downpipe and two pieces of hardware as shown in the product image. No gaskets or O2 sensor simulators are included.
Can we get our own brand on the box?
Yes. Private label packaging and barcode labels can be arranged, and bulk cartons are available for container orders.
Is this street legal where I sell?
This part is intended for racing and competition use only. It is not designed for street applications and may not comply with emissions regulations in your market. Check local laws before resale.
Get This Part Quoted
Send the quantity you need and your market, and the reply will cover price, packing and lead time.