2014-2024 Infiniti Q50 Axle-Back Exhaust
This axle-back system is built for the 2014-2024 Infiniti Q50 sedan. It replaces the factory rear muffler section and bolts to the factory mid-pipe flanges, leaving the stock catalytic converters and mid-pipe in place. Both the main piping and the tips are made from T201 stainless steel, and the system exits through dual 4-inch slant-cut tips.
Specifications
Specifications below apply to the standard Axle Back option (SKU FLBLO0007001).
| System Type | Axle-Back Exhaust — two-piece, bolt-on design |
|---|---|
| Main Piping | 2.4 in, mandrel-bent |
| Piping Material | T201 stainless steel |
| Tips | Dual 4 in slant-cut tips, welded to the piping — T201 stainless steel |
| System Weight | 13.3 lb |
| Installation | Bolt-on behind the factory catalytic converters; connects to the factory mid-pipe flanges. Official install notes: no cutting or welding required. |
Bundled Option — Axle Back + L&R Catalytic Converters: This option pairs the axle-back system with left and right catalytic converters for 2014-2015 Infiniti Q50 3.7L V6 models. It is sold as a separate variant and is not included with the standard Axle Back option.
Key Features
- Two-Piece Axle-Back Layout: The left and right sections replace the factory rear muffler section and connect to the stock mid-pipe flanges, so the install is contained to the rear portion of the exhaust.
- T201 Stainless Steel Piping and Tips: The main piping and the tips are both built from T201 stainless steel, so the visible system uses one consistent material.
- 2.4 in Mandrel-Bent Main Piping: Mandrel bending keeps the 2.4 in bore consistent through the curved sections instead of letting it collapse at the bends.
- Dual 4 in Slant-Cut Tips: Two 4-inch slant-cut tips are welded to the piping and align with both rear bumper outlets for a balanced, symmetrical rear view.
- Keeps the Factory Catalytic Converters and Mid-Pipe: This system mounts behind the stock converters and mid-pipe, so no catalytic converter or mid-pipe replacement is needed for the install.
What's Included
- Two-piece axle-back exhaust assembly (left and right sections)
- 4 in slant-cut stainless steel tips, welded to the piping
Check Before Ordering
- Confirm your Q50's year, engine, and drivetrain against the Fitment chart above before placing your order.
- This system keeps the factory catalytic converters and mid-pipe. The standard Axle Back option does not include catalytic converters.
- The bundled Axle Back + L&R Catalytic Converters variant is limited to 2014-2015 Q50 3.7L V6 models; select it only if your vehicle matches that configuration.
- Since included hardware is not itemized on this page, check whether new gaskets or clamps are needed for your factory mid-pipe connection before you start the install.
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 |
|---|---|---|---|---|
| 2014 | INFINITI | Q50 | 3.5L / 3.7L V6 | AWD / RWD — 4 Door |
| 2015 | INFINITI | Q50 | 3.5L / 3.7L V6 | AWD / RWD — 4 Door |
| 2016 | INFINITI | Q50 | 2.0L L4 3.0L / 3.5L V6 | AWD / RWD — 4 Door |
| 3.7L V6 | RWD — 4 Door | |||
| 2017 | INFINITI | Q50 | 2.0L L4 3.0L / 3.5L V6 | AWD / RWD — 4 Door |
| 3.7L V6 | RWD — 4 Door | |||
| 2018 | INFINITI | Q50 | 2.0L L4 3.0L / 3.5L V6 | AWD / RWD — 4 Door |
| 3.7L V6 | RWD — 4 Door | |||
| 2019 | INFINITI | Q50 | 2.0L L4 3.0L V6 | AWD / RWD — 4 Door |
| 3.5L V6 | RWD — 4 Door | |||
| 2020 | INFINITI | Q50 | 3.0L V6 | AWD / RWD — 4 Door |
| 3.5L V6 | RWD — 4 Door | |||
| 2021 | INFINITI | Q50 | 3.0L V6 | AWD / RWD — 4 Door |
| 3.5L V6 | RWD — 4 Door | |||
| 2022 | INFINITI | Q50 | 3.0L V6 | AWD / RWD — 4 Door |
| 2023 | INFINITI | Q50 | 3.0L V6 | AWD / RWD — 4 Door |
| 2024 | INFINITI | Q50 | 3.0L V6 | AWD / RWD — 4 Door |
2014-2024 Infiniti Q50 Axle-Back Exhaust FAQs
Q1: Which Infiniti Q50 years, engines, and drivetrains does this system fit?
A1: This axle-back exhaust covers the 2014-2024 Infiniti Q50 4-door sedan, with engine and drivetrain coverage that varies by year. 2014-2015 models are covered with the 3.5L / 3.7L V6 in AWD and RWD. From 2016 onward the 3.7L V6 is limited to RWD, and after 2021 the 3.5L V6 drops out of the chart. Check the Fitment chart above for the exact year, engine, and drivetrain combinations.
Q2: What is the difference between an axle-back and a cat-back exhaust?
A2: An axle-back system replaces only the rear section behind the catalytic converters — the portion that contains the factory mufflers — and keeps the factory mid-pipe. A cat-back system extends from the area behind the catalytic converters through a larger portion of the exhaust path. This product is an axle-back system, so it is limited to the rear section behind the stock converters and mid-pipe.
Q3: Does this system affect the catalytic converters or oxygen sensors?
A3: No. The system mounts behind the factory catalytic converters and connects to the mid-pipe flanges, so the converters, the mid-pipe, and their sensor locations are not part of the install and remain in their factory position.
Q4: Is cutting or welding required for installation?
A4: The official install notes describe a bolt-on installation with no cutting or welding required. The system is designed to connect to the factory mid-pipe flanges. Before installing, inspect the factory mid-pipe outlet and flange area for any previous modifications or corrosion.
Q5: What is included in the box?
A5: The kit includes the two-piece axle-back piping (left and right sections) with the 4-inch slant-cut stainless steel tips welded in place. Included hardware is not itemized on this page, so confirm your gasket or clamp needs against your factory mid-pipe connection.
Q6: What size are the exhaust tips?
A6: The system uses two 4-inch slant-cut tips made from T201 stainless steel. They are welded to the piping and positioned to align with both rear bumper outlets.
Q7: What material is this exhaust made from?
A7: Both the main piping and the tips are T201 stainless steel. T201 is a stainless grade selected for the piping and tip construction of this system.
Q8: How much does the system weigh?
A8: The published system weight is 13.3 lb. This covers the two-piece axle-back assembly with the tips welded in place.
Q9: What is the difference between the two options on this page?
A9: The standard Axle Back option is the two-piece axle-back system only. The Axle Back + L&R Catalytic Converters option adds left and right catalytic converters and is limited to 2014-2015 Q50 3.7L V6 models. If your vehicle is not a 2014-2015 3.7L V6, the standard Axle Back option is the matching choice.
Q10: Do you publish dyno or sound-level data for this system?
A10: Independent dyno and decibel figures are not published for this system. Exhaust tone depends on the engine and the rest of the exhaust system, so results vary between Q50 variants such as the 3.0L twin-turbo and the 3.7L V6.
Q11: Do I need to reuse any factory parts with this exhaust?
A11: Yes. The system is designed to work with the factory catalytic converters and the factory mid-pipe. It installs from the mid-pipe flanges rearward, so those stock components stay on the car. If the factory rear exhaust section has already been modified, have the connection points checked before ordering.
Q12: What are the shipping and return terms for this item?
A12: Orders ship free within the U.S. and are typically delivered within 7-9 business days after processing. Unopened and unused items in their original packaging can be returned within 30 days of receipt, and return shipping is covered for verified quality issues.