1995–1998 Nissan 240SX S14 2.4L Cat-Back Exhaust System (4" Muffler Tip)
The Flashark 1995–1998 Nissan 240SX S14 catback exhaust is engineered as a direct bolt-on replacement for the factory mid-muffler and tail section on 2.4L KA24DE coupes. It runs a single 3 in OD stainless steel piping path through one muffler and one resonator, and exits through a single 4 in polished muffler tip on the driver-side rear. The kit bolts to the existing catalytic converter with no modifications, and ships with the gaskets, bolts, and nuts needed for installation.
The system is built for the 1995–1998 240SX S14 chassis (Silvia SE / LE body) with the 2.4L KA24DE engine. The piping routing, hanger placements, and exit position are matched to the S14 chassis, so it drops in behind the factory catalytic converter without custom fabrication. If you are fitting a 1989–1994 S13 chassis, see "Check Before Ordering" below before purchasing.
Specifications
Specifications below apply to this 1995-1998 Nissan 240SX S14 catback configuration. Values are based on the manufacturer's SKU master data and the product's current published configuration.
| Parameter | Value |
|---|---|
| Brand | FLASHARK |
| Product Type | Cat-back exhaust system (single-outlet kit) |
| System Configuration | Single-side rear exit |
| Main Piping Diameter | 3 in OD |
| Outlet Diameter | 2.5 in OD |
| Muffler | Single muffler |
| Resonator | 1 resonator |
| Material | 201 stainless steel |
| Surface Finish | Polished silver |
| Tip Quantity | 1 |
| Tip Size | 4.5 in diameter (4 in visible outlet) |
| Tip Finish | Polished |
| Mounting Style | 2-bolt flange |
| Installation | Bolt-on; no cutting required |
| Placement on Vehicle | Rear |
| Designated Use | Racing / Off-Road |
Key Features
- Direct Bolt-On Fitment: The system mounts to the factory catalytic converter using a 2-bolt flange, so installation requires no cutting, no welding, and no modification to the existing exhaust path.
- Single 3 in OD Piping: A single 3 in OD pipe runs from the cat-back flange to the rear, paired with one resonator and one muffler, replacing the factory mid-pipe and tail section in one kit.
- Single 4 in Polished Muffler Tip: The system exits through a single driver-side rear polished tip sized at 4 in visible outlet (4.5 in full OD) — a large-diameter outlet for a wider exit than the factory tip.
- Stainless Steel Construction: The piping, muffler, and resonator are built from 201 stainless steel with a polished silver finish, paired with CNC-machined flanges for the connection points.
- Hardware Included: Gaskets, bolts, and nuts ship with the kit, so installation can be completed with the supplied hardware without sourcing additional fasteners.
- Designed for S14 Chassis: Piping routing and hanger positions are matched to the 1995–1998 240SX S14 chassis (Silvia SE / LE), so the kit drops in behind the factory catalytic converter without custom fabrication.
What's Included and Not Included
Included in this kit:
- Cat-back exhaust assembly (piping, resonator, muffler, single 4 in polished tip)
- Mounting gaskets
- Mounting bolts and nuts
Not included (must be reused / sourced separately):
- Factory catalytic converter — must remain on the vehicle; this kit bolts downstream of the cat
- Factory O2 sensors and oxygen sensor wiring — must be reused; the catback does not interact with O2 sensors
- Exhaust hangers / rubber mounts — must be reused from the factory if worn replacements are needed
Check Before Ordering
- Chassis fitment: This kit is for the 1995–1998 Nissan 240SX S14 (Silvia SE / LE) only. It is not a direct bolt-on for the 1989–1994 S13 chassis, which uses different mounting points and exhaust routing.
- Catalytic converter required: The factory catalytic converter must remain installed on the vehicle. This is a cat-back system, not a cat-back-and-front-pipe or turbo-back system.
- Designated use: This kit is designated for Racing / Off-Road use. Check your local emissions and street-legality rules before installing on a public-road vehicle. Federal, state, and local emissions compliance is not certified.
- Body style: Confirmed for the factory-equipped two-door coupe body. Convertible, hatchback, or other body variants of the S14 chassis are not confirmed.
- Engine: 2.4L KA24DE inline-4 only. The SR20DET swap or other engine conversions are not confirmed and may require additional adapters or modifications.
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
- Fits factory-equipped vehicles with listed configurations.
- ✅Please confirm vehicle specifications before ordering.
| YEAR | MAKE | MODEL | ENGINE | BODY |
|---|---|---|---|---|
| 1995-1998 | Nissan | 240SX | 2.4L L4 | Coupe — 2 Door |
⚠️ Important — Please verify before ordering:
- This kit is engineered for the 1995–1998 S14 chassis only. The 1989–1994 S13 uses a different chassis mounting point and exhaust routing; the kit is not a direct bolt-on for S13.
- Factory catalytic converter must remain on the vehicle. The catback installs downstream of the cat; it does not include a converter.
- Fitment assumes factory-equipped body and exhaust configuration. Heavily modified vehicles may require additional verification.
1995–1998 Nissan 240SX S14 Catback Exhaust System FAQs
Q1: Will this s14 exhaust system fit my 1995-1998 Nissan 240SX perfectly?
A1: This catback is built as a direct bolt-on for the 1995-1998 Nissan 240SX S14 chassis (Silvia SE / LE) equipped with the 2.4L KA24DE inline-4 engine, two-door coupe body. It bolts to the factory catalytic converter using a 2-bolt flange, so no cutting, no welding, and no modification to the existing exhaust is required.
Q2: The title mentions both chassis. Can I use this as a nissan s13 exhaust?
A2: No. The piping routing and hanger positions on this kit are matched to the 1995-1998 S14 chassis, and it is not a direct bolt-on for the 1989-1994 S13. If you have a 1989-1994 240SX, check our store for the dedicated S13 catback listing or consult a professional exhaust shop for a custom adaptation.
Q3: Is the tip on this s14 4 inch exhaust actually 4 inches?
A3: The visible tip outlet is 4 in, with a 4.5 in full outer diameter at the rolled edge. The system finishes with a single polished tip exiting on the driver-side rear of the vehicle.
Q4: Do I need any welding or special tools to install this s14 exhaust?
A4: No welding is required. The kit uses a 2-bolt flange to mount to the factory catalytic converter, and the supplied gaskets, bolts, and nuts cover the connection. Standard hand tools (socket set, jack, and jack stands) are sufficient for a typical home garage installation.
Q5: What materials are used to construct this s14 exhaust system?
A5: The piping, resonator, muffler, and tip are built from 201 stainless steel with a polished silver finish. The connection flanges are CNC-machined for flat, leak-free sealing against the supplied gaskets.
Q6: Will upgrading my 240sx muffler and piping trigger a Check Engine Light?
A6: Because the kit installs behind the factory catalytic converter and leaves the O2 sensors and primary emissions equipment untouched, installing the catback alone does not trigger a Check Engine Light. However, this kit is designated for Racing / Off-Road use; confirm local emissions and street-legality rules before installing on a public-road vehicle.
Q7: How durable are the joints and flanges on this 240sx exhaust?
A7: The connection points are CNC-machined flanges paired with the supplied gaskets, which provides a flat, even seal against the catalytic converter flange. The single-bolt and 2-bolt joint design distributes clamping force evenly across the gasket surface.
Q8: What does the Flashark 240SX muffler section look like?
A8: The kit includes one main muffler and one resonator in the piping path, then exits through a single 4 in polished tip on the driver-side rear. The muffler body and resonator are both built into the cat-back assembly rather than supplied as separate bolt-on sections.
Q9: Will this catback require any tuning?
A9: No engine tuning is required for installation. The kit bolts to the factory catalytic converter and does not modify the O2 sensor, catalytic converter, or any emissions-controlled component. The factory ECU map remains in place.
Q10: Is this kit CARB or 50-state legal?
A10: This kit is designated for Racing / Off-Road use and is not certified as CARB-compliant or 50-state legal for public-road vehicles. Check your state and local emissions rules before installing on a registered street car.
Q11: What hardware ships with the kit?
A11: The kit ships with mounting gaskets, mounting bolts, and mounting nuts, which is everything needed to bolt the catback to the factory catalytic converter flange. The factory catalytic converter, O2 sensors, and exhaust hangers are reused from the vehicle.
Q12: How is this different from a slip-on exhaust?
A12: A slip-on typically replaces only the rear muffler and tip section, leaving the factory mid-pipe in place. This catback replaces the mid-pipe, resonator, muffler, and tip in a single kit downstream of the factory catalytic converter, giving a full exhaust path change rather than a tail-only change.
Q13: I have a 1989-1994 240SX. Should I order this kit?
A13: No. This kit is matched to the 1995-1998 S14 chassis and is not a direct bolt-on for the 1989-1994 S13. Check our store for the dedicated S13 catback listing for the 1989-1994 chassis, or consult a professional exhaust shop for custom adaptation if you want to use this S14 kit.