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Sport-Level Exhaust Character for the 2015-2021 Subaru WRX and WRX STI
The CORSA 14857BLK is a 3.0-inch Sport cat-back exhaust system built for the 2015-2021 Subaru WRX 2.0L Turbo and WRX STI 2.5L Turbo. Using CORSA RSC technology at Sport level, the 14857BLK delivers a refined but distinctly more aggressive exhaust character while eliminating drone at highway speeds. The system exits through twin 3.5-inch matte black PVD Pro-Series tips for a clean, stealthy appearance under the rear bumper.
Key Features
- CORSA RSC technology at Sport level for WRX and WRX STI exhaust character
- 3.0-inch mandrel-bent T304 stainless steel construction
- Twin 3.5-inch matte black PVD Pro-Series exhaust tips
- Sport sound level: more aggressive than stock, drone-free at highway speeds
- Fits 2015-2021 Subaru WRX 2.0L Turbo and WRX STI 2.5L Turbo
- CORSA limited lifetime warranty
- Made in Berea, Ohio, USA
Vehicle Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2015-2020 | Subaru | WRX | Base |
| 2015-2020 | Subaru | WRX | Limited |
| 2015-2020 | Subaru | WRX | Premium |
| 2015-2020 | Subaru | WRX STI | Limited |
| 2015 | Subaru | WRX STI | Launch Edition |
| 2016 | Subaru | WRX STI | Series.HyperBlue |
Specifications
| Detail | Value |
|---|---|
| MPN | 14857BLK |
| UPC | 847466015496 |
| Pipe Diameter | 3.0 inches |
| System Type | Cat-Back |
| Sound Level | Sport |
| Tip Style | Twin 3.5-inch Matte Black PVD Pro-Series |
| Exit | Dual Rear Exit |
| Engine | 2.0L Turbo / 2.5L Turbo |
| Material | T304 Stainless Steel |
| Warranty | Limited Lifetime |
What's Included
- 1x CORSA 14857BLK Sport cat-back exhaust system
- Twin 3.5-inch matte black PVD Pro-Series exhaust tips
- All hardware, clamps, and gaskets for bolt-on installation
About CORSA Performance
Founded in 1989 in Berea, Ohio, CORSA Performance invented Reflective Sound Cancellation technology and engineers exhaust systems for sport vehicles and performance platforms. Every CORSA system uses T304 aircraft-grade stainless steel with a limited lifetime warranty and is assembled in the USA.
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Frequently Asked Questions
What is the CORSA 14857BLK?The CORSA 14857BLK is a 3.0-inch Sport cat-back exhaust for the 2015-2021 Subaru WRX 2.0L Turbo and WRX STI 2.5L Turbo, delivering a refined and more aggressive exhaust note through twin matte black PVD 3.5-inch tips using RSC technology for a completely drone-free driving experience.
How does the 14857BLK differ from the 14857 polished version?Both are the same 3.0-inch Sport cat-back with identical fitment, construction, and sound. The 14857 uses polished stainless Pro-Series tips; the 14857BLK uses matte black PVD tips for a stealthier appearance.
Is the 14857BLK drone-free at highway speeds?Yes. CORSA RSC technology is precisely tuned for the WRX and STI turbocharged platform to eliminate drone at sustained highway speeds.
Does this fit the 2021 Subaru WRX STI?Yes. The CORSA 14857BLK fits the 2015 through 2021 Subaru WRX and WRX STI models.
Does installation require cutting or welding?No. The CORSA 14857BLK is a direct bolt-on cat-back replacement with no cutting or welding required.
Does this fit the 2022+ WRX?No. The 14857BLK covers the VA-generation WRX and STI (2015-2021). The 2022 WRX uses a different platform and requires a separate part number.
Is a tune required?No. The 14857BLK retains factory catalytic converters and does not require any ECU tune.
What warranty does the 14857BLK carry?CORSA backs the 14857BLK with a limited lifetime warranty against defects in materials and workmanship when purchased from an authorized dealer.
Installation Instructions
- Safely raise and support the WRX or STI on rated jack stands or a lift
- Allow the factory exhaust to cool completely
- Disconnect the factory cat-back at the catalytic converter outlet
- Remove all factory muffler and pipe sections
- Test-fit CORSA 14857BLK sections before tightening hardware
- Attach to factory hangers and install all supplied hardware and clamps
- Torque all connections to specification and verify tip alignment
- Start engine and inspect all connections for leaks
Prop 65 Warning: This product can expose you to chemicals including nickel compounds, which are known to the State of California to cause cancer, and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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