Subaru WRX (2015–2021) · Cat-back exhaust
Is a Cat-Back Exhaust Worth It on a Subaru WRX?
Short answer · Depends
Worth it mainly for sound. On a 2015–2021 WRX, a cat-back exhaust typically costs $500–$1,500 and adds character, but on its own adds little power without a tune. The biggest risk is highway drone. Check local noise laws, and avoid muffler deletes if you do long highway drives.
- Typical cost
- Typical $500–$1,500
- Difficulty
- Moderate (jack stands, penetrating oil)
- Time
- 2–4 hours
Worth it if…
- You want more boxer/turbo character
- You'll pick a resonated, drone-tested design
- You'll keep the car long-term
Skip it if…
- You commute 1+ hour on the highway daily (drone)
- You expect big power gains without a tune
- You live somewhere with strict noise enforcement
Will it fit my car?
- Buy for the exact body: 2015–2021 (VA) differs from 2022+ (VB).
- Sedan WRX vs. STI can have different hangers and tips.
- Resonated options usually drone less than straight-through/muffler-delete designs.
- Some states and cities enforce noise limits; keep the stock exhaust.
Sound clips beat spec sheets
Listen to in-cabin clips at highway speed for any system you're considering; that's where drone shows up, and it's the #1 regret with exhaust mods.
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FAQ
Does a cat-back exhaust add horsepower to a WRX?
Usually only a small amount on its own; most real gains come with a tune and other supporting mods.
Will a cat-back fail emissions?
A cat-back keeps the catalytic converters, so it usually doesn't affect emissions testing, but loud systems can break noise laws.
Updated 2026-10-21. Costs are typical US ranges, not quotes. Check local laws and your warranty before modifying your car.