Flashark Catback Exhaust System for 2015-2021 Subaru WRX / STI, 4-inch Quad Muffler Tips, N1 Style Burnt Tip
Upgrade your 2015-2021 Subaru WRX / STI with the FLASHARK Catback Exhaust System, designed for performance, style, and durability. Built from high-quality stainless steel with mandrel-bent piping and CNC-machined flanges, this direct bolt-on WRX catback exhaust delivers smoother airflow and a sportier tone. Featuring 4-inch quad muffler tips with an N1-style burnt finish and a polished mirror surface, it enhances both sound and appearance while ensuring long-lasting reliability.
Fitment:
- 2015-2021 Subaru WRX
- 2015-2021 Subaru WRX STI
Specifications:
Brand Name: FLASHARK
Certificate: ISO9001:2000
Material: Stainless Steel
Surface: Mirror Polish
Application: Catback Exhaust
4" quad outlet tip with a burnt finish
3" Catback Exhaust
Features:
- Stainless Steel construction
- Mandrel-bent exhaust piping
- CNC-machined flanges
- Direct bolt-on replacement
2015-2021 Subaru WRX/STI Catback Exhaust System Style Comparison
| Photos |
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 |
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| Style |
Burnt Tips (Axle Back) |
Burnt Catback |
Burnt Catback w/Muffler |
| Look |
Axle-back w/ burnt tips |
Full cat-back, no muffler |
Full cat-back with mufflers |
| Sound |
Louder than stock, clean tone |
Aggressive, raw sound |
Deep but more refined |
| Acceleration Sound |
Sporty & crisp |
Aggressive, race-inspired |
Deep, refined tone |
| Performance |
Slight gain in flow & sound |
Better flow, more throttle response |
Great balance of power & noise |
| Best For |
Budget-friendly upgrade with sportier tone |
Maximum volume & street performance |
Daily drivers who want performance without being too loud |
OEM Exhaust vs Catback Exhaust: 2015-2021 Subaru WRX/STI
Upgrading the exhaust on your 2015-2021 Subaru WRX/STI is more than a cosmetic change—it’s about unlocking better sound, performance, and driving enjoyment.
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Sportier Sound: Enjoy a deeper, more aggressive tone than the quiet stock system.
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Improved Engine Response: Reduced backpressure allows your turbocharged engine to breathe freely, making acceleration sharper and more engaging.
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Enhanced Driving Experience: Every drive feels livelier, with a richer engine note and more exhilarating throttle response.
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Durable & Stylish: Built from stainless steel with polished or burnt quad tips, Catback systems resist corrosion and give the rear of your WRX/STI a sportier, performance-inspired look.
Upgrading isn’t just about volume—it’s about transforming your WRX/STI into a more thrilling, confident, and visually striking ride.
Why Choose Flashark Catback Exhaust?
Flashark Catback Exhausts are designed for Subaru enthusiasts who demand more than stock. Every system combines precision engineering, premium materials, and motorsport-inspired style to give your WRX/STI a driving experience that stands out from the crowd.
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Track-Tested Performance: Every system is engineered for maximum exhaust flow and optimal throttle response.
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Premium Materials: Crafted from stainless steel with precision TIG welding and CNC-machined flanges for leak-free, long-lasting durability.
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Plug-and-Play Fitment: Direct bolt-on installation for 2015-2021 WRX/STI—no cutting, no modifications.
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Distinctive Style: N1-style burnt quad tips provide a motorsport-inspired aesthetic and aggressive stance.
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Unmatched Sound: Engineered to deliver a deep, resonant tone that balances daily comfort with exhilarating performance.
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Trusted Brand: Flashark has earned a reputation for quality, reliability, and performance in the Subaru aftermarket community.
Upgrade with Flashark and enjoy a WRX/STI that looks, sounds, and drives like a true performance machine.
What Makes N1-Style Exhaust Sound Special?
The N1-style exhaust is a motorsport-inspired design, originally developed for race-prepped Subarus. Its signature characteristics include:
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Straight-Through Design: Minimizes backpressure for freer engine breathing and sharper throttle response.
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Aggressive Tone: Produces a crisp, deep, and slightly raw exhaust note, giving your WRX/STI a track-inspired sound.
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Distinctive Pops and Burbles: During deceleration, the exhaust delivers subtle pops and burbles, enhancing the sporty character.
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Enhanced Aesthetic: Often paired with burnt or blue-tipped quad outlets for a visually striking rear appearance.
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Balanced Daily Usability: Depending on muffler inclusion, N1-style systems can deliver exciting sound without excessive drone for everyday driving.
Vehicle Overview: 2015-2021 Subaru WRX / STI
The 2015-2021 Subaru WRX and WRX STI are compact performance sedans built for driving enthusiasts who demand excitement both on the street and on the track. Equipped with a turbocharged Boxer engine, these models deliver strong low- and mid-range torque, which responds exceptionally well to performance upgrades like a Catback exhaust. Their Symmetrical All-Wheel Drive system provides precise handling and excellent traction, making any improvement in power and exhaust flow immediately noticeable.
The WRX STI, in particular, features factory-tuned suspension and engine enhancements that reflect its motorsport heritage, giving drivers a track-ready platform straight from the factory. Understanding the capabilities of the 2015-2021 Subaru WRX and WRX STI highlights why a high-quality Catback exhaust not only improves engine sound and performance but also complements the car’s naturally sporty and responsive character, making every drive more engaging.
FAQ
Q1: What years and models does this Flashark Catback fit?
The Flashark Catback Exhaust is designed specifically for 2015-2021 Subaru WRX and WRX STI models. Both manual and CVT transmissions are supported.
Q2: Will I need a tune after installing the Catback?
No tune is required. The Catback is a direct bolt-on upgrade that maintains stock ECU settings while improving sound and flow.
Q3: What is the difference between the three versions?
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Burnt Tips (Axle Back): Sporty sound with minor volume increase.
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Burnt Catback: Aggressive, raw tone with no muffler.
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Burnt Catback w/ Muffler: Deep, refined sound suitable for daily driving.
Q4: How loud is the Flashark Catback compared to stock?
Depending on the version, expect a noticeable increase over stock. Axle Back is moderately louder, Catback without muffler is the loudest, and Catback with muffler is balanced for comfort.
Q5: Is installation difficult?
Installation is simple with a standard socket set and jack. The system is designed for direct bolt-on replacement, requiring no cutting or welding.
Q6: Will this exhaust cause drone at highway speeds?
The Burnt Catback w/ Muffler minimizes drone for comfortable daily driving. The no-muffler version may produce mild drone at certain RPMs.
Q7: Are all materials corrosion-resistant?
Yes, the exhaust is made from high-quality stainless steel with TIG welding and mirror-polished tips for long-lasting durability.
Q8: Can I use this exhaust on a stock WRX or STI?
Absolutely. The Flashark Catback is compatible with completely stock cars without requiring additional modifications.
Q9: Does this exhaust improve performance?
Yes, the improved flow can enhance throttle response and create a slightly more aggressive engine note, making driving feel more engaging.
Q10: What makes N1-style tips unique?
N1-style tips are burnt or blue-finished quad outlets that provide a motorsport-inspired look and deliver a distinctive, aggressive exhaust tone, elevating both style and performance.
