Upgrade your 2003–2006 Nissan 350Z with FLASHARK Exhaust Downpipes Test Pipes designed for the VQ35DE engine. These high-performance test pipes are engineered to replace the restrictive catalytic converters, improving exhaust flow and increasing horsepower. Whether you drive a 350Z, these downpipes are perfect for enhancing engine output and delivering a more aggressive exhaust note. With easy fitment for the Nissan 350Z, this product is a must-have for enthusiasts looking to boost performance.
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Features:
1. Improves engine output and Efficiency, gives you an extra HP, and increases torque 2. Large diameter and free-flow tubing for unrestricted flow, making the exhaust airflow smooth, designed for high-performance racing 3. Made of High-Quality 16-gauge T-304 Stainless Steel with Computerized Mandrel-Bends 4. All joints are TIG welded to prevent cracking and wear 5. CNC Machine Flange for MAX Strength and Durability 6. Flanges chrome-plated for corrosion resistance
Test Pipes/Downpipes are designed to replace the restrictive catalytic converters in your vehicle’s exhaust system, reducing exhaust drag and increasing power output. This upgrade is typically used in track and high-performance applications for those seeking improved engine efficiency and power.
For the 2003–2006 Nissan 350Z, 350Z test pipes eliminate the factory catalytic converters, allowing for a freer-flowing exhaust system. This modification can lead to noticeable gains in horsepower and torque, enhancing overall engine performance. By removing catalytic converters, these parts reduce the risk of clogging or failure, potentially lowering long-term maintenance costs.
If you like this 1999-2006 4.8L, 5.3L, 6.0L Test Pipe, please feel free to buy it; after purchasing, you can always contact us for a full refund if you don't want it;
Product FAQ
Will these test pipes fit my Nissan 350Z or Infiniti G35?
A: These test pipes are designed for the following 3.5L VQ35DE applications:
2003–2006 Nissan 350Z (Z33), RWD
2003–2006 Infiniti G35 Sedan (V35), RWD or AWD
2003–2007 Infiniti G35 Coupe (V35), RWD
Please confirm your year, body style, engine and drivetrain before ordering.
Which vehicles do these test pipes NOT fit?
A: They do not fit 2007–2008 Nissan 350Z models with the VQ35HR engine, 2007 and newer Infiniti G35 Sedans with the VQ35HR engine, Infiniti G37 models, or Nissan 370Z models. These vehicles use a different exhaust layout.
Do these fit both RWD and AWD Infiniti G35 models?
A: They fit applicable 2003–2006 Infiniti G35 Sedan RWD and AWD models equipped with the 3.5L VQ35DE engine. The 2003–2007 G35 Coupe is a RWD application. Fitment is determined by body style, engine and drivetrain—not by model name alone.
Are these downpipes or test pipes?
A: These are catless test pipes. They replace the factory catalytic-converter sections located between the exhaust manifolds and Y-pipe. “Downpipe” may be used as a general search term, but test pipes are the technically accurate product name for these naturally aspirated VQ35DE applications.
What is included with the base Test Pipes option?
A: The base option includes one left test pipe, one right test pipe, gaskets and installation hardware. Package contents vary for bundle options, so please check the selected Type and corresponding product images before ordering.
Will these test pipes work with the factory exhaust?
A: They are designed to connect to factory-style exhaust manifold and Y-pipe flange locations. Compatibility with aftermarket headers, Y-pipes or modified exhaust systems cannot be guaranteed because flange position and pipe geometry may differ.
Will installing catless test pipes cause a check-engine light?
A: A catalyst-efficiency check-engine light may appear because the factory catalytic converters are removed. The result varies by vehicle and ECU calibration. Flashark does not guarantee that spacers or other devices will prevent a warning light.
Is ECU tuning required after installation?
A: The vehicle may run without an immediate tune, but professional ECU tuning is recommended when combining these test pipes with other airflow or exhaust modifications. Tuning may improve drivability and help optimize the complete setup, but it does not change local emissions requirements.
Will the exhaust become louder?
A: Yes. Removing the factory catalytic converters normally produces a louder and more aggressive exhaust note. Additional rasp, cabin drone and stronger exhaust odor may also occur, especially when used with aftermarket headers, Y-pipes or cat-back exhaust systems.
How much horsepower will these test pipes add?
A: Actual gains vary according to engine condition, exhaust configuration, supporting modifications and ECU tuning. These test pipes reduce exhaust restriction, but no specific horsepower or torque increase is guaranteed for every vehicle.
Are the oxygen sensors included?
A: Oxygen sensors are not included. Compatible factory sensors are transferred to the sensor bungs on the new pipes. Inspect the sensors and wiring before installation and replace damaged components when necessary.
Is professional installation recommended?
A: Yes. Professional installation is recommended because seized fasteners, limited working space and exhaust alignment can make installation difficult. Inspect the flanges, gaskets and hardware for leaks after installation and recheck the fasteners after the first heat cycle.
Are these catless test pipes street legal?
A: These pipes remove the factory catalytic converters and are intended for closed-course competition or off-road use where permitted. They may not be legal for use on public roads and may cause the vehicle to fail emissions or inspection requirements. Check all applicable local laws before purchasing or installing.