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SKU: B515140 | UPC: 700424677429
Cobb 2015-2021 Subaru WRX/STI Titanium 3in Catback Exhaust
The Cobb Titanium 3" Catback Exhaust replaces the factory system from the catalytic converter back on 2015-2021 Subaru WRX and 2015-2019 WRX STI models. This direct-fit system uses lightweight titanium tubing to cut over 14 lbs off the vehicle's rear weight while boosting exhaust flow for 10-12 wheel horsepower gains and quicker throttle response. Enjoy a deep, aggressive exhaust tone tuned to minimize cabin drone on highways.
Key Features
- Titanium Construction: Full titanium mid-pipe and muffler weigh just 17 lbs total, shedding 14.7 lbs from stock WRX (31.7 lbs) or 14.5 lbs from STI for better acceleration and handling.
- 3-Inch Mandrel-Bent Tubing: Smooth bends and larger diameter increase exhaust velocity, adding 10-12 whp and 12-15 ft-lbs torque across the RPM range.
- Aggressive Sound Tuning: Deep rumble at idle builds to a throaty roar under load, with Helmholtz muffler design reducing interior drone for daily driving comfort.
- Burnt Titanium Tips: Dual 4.5-inch slash-cut outlets provide heat-colored finish and bold rear stance without polishing.
- Bolt-On Design: Uses factory hangers and 3" V-band connections for simple replacement, no fabrication needed.
Product Notes
- MPN 515140 made in the USA with precision TIG-welded titanium.
- Inspect tips periodically for heat discoloration, normal for titanium.
Installation Notes
- Professional installation recommended.
- Requires stock catalytic converter 3" inlet mates directly to cat flange.
- Reuses OEM rubber hangers and clamps torque V-band clamps to 8-10 ft-lbs.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2015-2021 | Subaru | WRX | Base, Premium, Limited |
| 2015-2019 | Subaru | WRX STI | Base, Limited |
Why Choose Cobb?
- Subaru performance leader with 20+ years developing WRX/STI parts.
- Track-tested designs from dyno and road data for real-world gains.
- Precision-engineered in-house for exact VA-chassis fitment.
Frequently Asked Questions
-
Q: Does this fit 2020-2021 WRX models?
A: Yes, direct bolt-on for all 2015-2021 WRX trims including Base, Premium, and Limited with no modifications. -
Q: What material is used and is it durable?
A: Grade 2 titanium tubing and muffler with stainless flanges; corrosion-resistant and rated for 1200°F+ exhaust temps. -
Q: What is the warranty and install time?
A: 1-year limited warranty DIY install takes 1-2 hours with basic tools, ramps recommended.
Shipping & Handling
- Method: UPS or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Oversized box measuring 58" x 14" x 14"
- Weight: 22 lbs
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