2003-2009 Nissan 350Z 3.5L V6 Cat Back Exhaust System
A cat-back system is one of the most common first exhaust upgrades for a 350Z, because it replaces the section behind the catalytic converters in one bolt-on job. This Flashark system is built for the listed 2003-2009 Nissan 350Z 3.5L V6 coupe and convertible applications, and combines mandrel-bent 2.36-inch piping, two mufflers, two resonators, and 4.5-inch dual burnt tips in one package.
The base option on this page is the cat-back system on its own. Two additional variants bundle it with a header or with a header and downpipe for listed 03-06 Nissan 350Z applications, so review the variant table under What's Included before you order.
Specifications
The specifications below apply to the Catback Exhaust option (SKU FLES08131). Check them against your current setup, especially if your 350Z already has aftermarket exhaust parts installed.
| Brand | Flashark |
| Product Type | Cat-back exhaust system |
| System Configuration | Dual-exit cat-back system |
| Main Pipe Diameter | 2.36 in OD |
| Pipe Design | Mandrel-bent piping |
| Flange Construction | TIG-welded and CNC-machined flanges |
| Tip Quantity | 2 |
| Tip Size | 4.5 in OD double-walled rolled tips |
| Tip Finish | Burnt |
| Exit Position | Dual rear exit |
| Muffler Configuration | Dual mufflers |
| Resonator | 2 resonators |
| Material | 201 stainless steel |
| Surface Finish | Polished |
| Installation | Bolt-on; no cutting or welding on listed stock-fit applications |
| Hardware Included | Gaskets, bolts, and nuts |
Key Features
- Cat-Back System Layout: Replaces the exhaust section behind the factory catalytic converters, covering more of the exhaust path than an axle-back section, so you know exactly where this system starts and stops before you order.
- Dual Mufflers With Two Resonators: Both rear mufflers and both resonators ship with the system, which is designed to keep the rear section more controlled than a resonator-free or straight-piped setup while you decide how far to take your build.
- 2.36-Inch Mandrel-Bent Piping: The mandrel-bending process keeps the pipe diameter consistent through the bends instead of pinching it, which supports smoother flow through the rear section than crush-bent piping.
- 4.5-Inch Double-Walled Burnt Tips: Two 4.5-inch rolled tips with a burnt finish fill out the factory rear bumper openings and are the most visible part of the install, so the rear end reads as a finished dual-exit setup.
- 201 Stainless Steel Construction: The piping, mufflers, and tips are built in stainless steel, giving the system the corrosion resistance expected from stainless exhaust construction under normal street use.
- Bolt-On Installation: The system installs without cutting or welding on listed stock-fit applications, and the gaskets, bolts, and nuts you need for the cat-back section are included in the box.
- Three Ordering Options: The base variant is the cat-back alone for 2003-2009, while the two bundle variants add a header or a header plus downpipe for listed 03-06 applications, so you can match the package to your build stage instead of buying parts twice.
System Design And Installation Video
This is a cat-back exhaust system, not an axle-back muffler section. It replaces the piping and components from behind the catalytic converters to the rear of the car, including both mufflers, both resonators, and the tips. The factory catalytic converters and oxygen sensors stay in place with this cat-back-only option.
Sound character depends on the complete exhaust path. Because the system keeps two mufflers and two resonators, it is built to stay more controlled than a straight-piped rear section, but the final tone depends on your headers, catalytic converters or test pipes, resonator choices, and engine condition.
4.5-Inch Dual Burnt Tips
The 4.5-inch dual burnt tips give the rear of the 350Z a fuller, more finished look without changing the bumper. For many owners this is the first thing they notice after the install, because the dual-exit layout fills the rear openings more completely than the factory setup.
See how Jake Cande installs dual exhaust! (350Z)
Single Tip Vs Dual Tip 350Z Catback Exhaust
For a 350Z, the choice between a single-tip and dual-tip catback is not only about sound. It changes the rear-end look, the visual balance of the build, and how the car reads from behind. A dual-tip setup like this one keeps the back of the car fuller and closer to a factory-style dual-exit appearance.
| Setup | Best For | What To Expect |
|---|---|---|
| Dual Tip 350Z Catback Exhaust | Owners who want a fuller rear bumper look and a balanced street build | Dual-exit appearance with two mufflers and two resonators, and a cleaner OEM+ style from the rear |
| Single Tip 350Z Catback Exhaust | Owners who prefer a simpler, lighter-looking, more aggressive single-exit style | More minimal rear appearance, often a rawer street-build look, depending on muffler and pipe layout |
If the car still has the factory rear bumper and you want the back end to look filled out, the dual-tip setup usually makes more sense. If you are building a more stripped-down drift-style or track-inspired 350Z, a single-tip catback may fit that look better.
For a more minimal setup, you can also check the Flashark Single Tip Catback Exhaust for compatible 350Z and G35 applications. Choose the dual-tip exhaust on this page if you want the fuller rear-end look, dual muffler layout, and dual-exit appearance.
What's Included
What arrives in the box depends on the variant you select:
| Variant | SKU | Listed Fitment | What's In The Box |
|---|---|---|---|
| Catback Exhaust | FLES08131 | 2003-2009 Nissan 350Z 3.5L | Complete cat-back system: mandrel-bent piping, 2 mufflers, 2 resonators, dual 4.5 in burnt tips, plus gaskets, bolts, and nuts |
| 03-06 Nissan 350z Catback+Header | FLES08276-ES08131 | 03-06 Nissan 350Z | The cat-back system above plus the header listed for 03-06 Nissan 350Z applications |
| 03-06 Nissan 350z Catback+Header+Downpipe | FLES08276-ES08324-ES08131 | 03-06 Nissan 350Z | The cat-back system above plus the header and downpipe listed for 03-06 Nissan 350Z applications |
The cat-back-only option does not include headers, a downpipe, or test pipes. If you need those parts, use the matching bundle variant or contact customer support before ordering.
Check Before Ordering
- Confirm your year and body style: the cat-back option is listed for 2003-2009 Nissan 350Z 3.5L V6 coupe and convertible applications, while the bundle variants are listed for 03-06 applications.
- Confirm the variant you select: the three options differ in what ships in the box, and the front-section parts in the bundles follow the 03-06 year range.
- Check your current exhaust: if the car has previous exhaust work, aftermarket parts, or rusted factory hardware, confirm compatibility with customer support before purchase.
- This is not a G35 listing: 350Z and G35 fitment is not interchangeable. If you own an Infiniti G35, use a G35-specific listing or contact support first.
- Emissions and local rules: a cat-back system does not replace the catalytic converters, but sound limits and inspection rules vary by state and county, so check your local regulations before installing.
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.
Fitment & Compatibility
⚠️ Please verify engine, drivetrain and body configuration before purchase.
| YEAR | MAKE | MODEL | ENGINE | DRIVE / BODY |
|---|---|---|---|---|
| 2003-2009 | Nissan | 350Z | 3.5L V6 | RWD — 2 Door |
2003-2009 Nissan 350Z 3.5L Cat Back Exhaust FAQs
Q1: Will this fit my 2003-2009 Nissan 350Z?
A1: This exhaust is designed for listed 2003-2009 Nissan 350Z 3.5L applications. Always confirm your year, body style, trim, and selected variant before ordering, especially if your car has previous exhaust modifications.
Q2: Is this a cat-back exhaust or an axle-back exhaust?
A2: This is a cat-back exhaust system. It replaces more of the exhaust section behind the catalytic converters than an axle-back setup, covering the piping, mufflers, resonators, and tips.
Q3: How much horsepower can this 350Z exhaust add?
A3: There is no dyno-verified horsepower figure published for this specific system, so no accurate number can be promised for every car. Results depend on engine condition, existing modifications, and whether the car is tuned. Treat any third-party figures you see elsewhere as estimates rather than guarantees.
Q4: Will this exhaust make my 350Z too loud for daily driving?
A4: The system keeps two mufflers and two resonators, which is built to keep the rear section more controlled than a straight-piped setup. How loud the car ends up depends on your headers, catalytic converters or test pipes, and overall exhaust configuration.
Q5: Does this exhaust include headers or test pipes?
A5: The cat-back-only option does not include headers or test pipes. Two bundle variants add a header or a header plus downpipe for listed 03-06 Nissan 350Z applications, so check the selected variant carefully before purchase.
Q6: Will this trigger a check engine light?
A6: A cat-back exhaust installs behind the catalytic converters and factory oxygen sensors, so it should not trigger a check engine light on a healthy stock emissions setup. Existing sensor issues, test pipes, headers, or other exhaust changes may still affect CEL behavior.
Q7: Is this a full 350Z exhaust system?
A7: It is a cat-back exhaust system, not a complete front-to-rear exhaust package. It replaces the rear exhaust section behind the catalytic converters. If you need headers, a downpipe, or test pipes, check the bundle variants or related exhaust options before ordering.
Q8: Will the 4.5-inch tips fit the factory rear bumper?
A8: The 4.5-inch dual tips are designed to work with the listed 350Z rear exhaust layout. Tip alignment can still vary slightly depending on hanger condition, previous exhaust work, and how the system is tightened during installation.
Q9: Can I install this exhaust at home?
A9: Many experienced DIY owners can install a cat-back exhaust at home with jack stands, basic hand tools, and penetrating oil. If the factory bolts are badly rusted or the car has custom exhaust work, professional installation is the safer choice.
Q10: Do I need a tune after installing this exhaust?
A10: A tune is usually not required for a cat-back-only install. A tune may help if the car also has an intake, headers, test pipes, or other airflow changes, but the cat-back by itself is a straightforward bolt-on upgrade.
Q11: Is this exhaust good for a stock 350Z?
A11: Yes, it is a practical first exhaust upgrade for many stock 350Z owners who want a changed rear-end look and a cat-back layout without building a fully custom exhaust system.
Q12: Will this fit a G35?
A12: Do not assume 350Z and G35 exhaust fitment is the same. This product page is for the listed Nissan 350Z applications. If you own an Infiniti G35, use a G35-specific exhaust listing or contact customer support before ordering.
Q13: Is this exhaust legal for street use?
A13: Exhaust laws vary by state, county, and inspection rules. A cat-back system usually does not replace catalytic converters, but sound limits and local regulations still apply. Check your local laws before installing.
Q14: What should I check before buying?
A14: Confirm your vehicle year, model, engine, body style, selected variant, and current exhaust condition. Also check whether your car still has the factory exhaust routing or has been modified by a previous owner.
Q15: What should I do if I am not sure about fitment?
A15: Contact customer support before purchase. Send your vehicle year, model, engine, body style, drivetrain details, and photos of your current exhaust if possible. That helps avoid ordering the wrong setup.