The COBB 15-19 Subaru WRX/STi Titanium 3in Catback Exhaust does not have enough exact application evidence to assign safe vehicle YMM. Match manufacturer part number 515140, complete vehicle, engine and transmission configuration, factory equipment, required calibration, emissions eligibility, interfaces, and every product note before ordering.

Key Features

• 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.
• 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.
• 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.
• Bolt-On Design: Uses factory hangers and 3″ V-band connections for simple replacement, no fabrication needed.
• Burnt Titanium Tips: Dual 4.5-inch slash-cut outlets provide heat-colored finish and bold rear stance without polishing.
• Reuses OEM rubber hangers and clamps torque V-band clamps to 8-10 ft-lbs.

Fitment

Specifications

What’s Included

One new COBB product in the exact configuration and quantity identified by manufacturer part number 515140. Calibrations, hardware, hoses, clamps, gaskets, adapters, wiring, fluids, tools, and companion components are included only when expressly stated for this exact part number.

About COBB

COBB develops engine-management, intake, cooling, exhaust, drivetrain, suspension, and vehicle-accessory products for supported performance platforms. Correct selection remains exact-vehicle, exact-configuration, exact-interface, and exact-part-number specific.

Related COBB Products

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• Cobb 22-24 Subaru WRX Stainless Steel 3in. Catback Exhaust

Browse the COBB collection for related tuning, intake, cooling, exhaust, drivetrain, and chassis products.

Frequently Asked Questions

Why is fitment verification required for this COBB product?
Exact vehicle application evidence is not complete enough for safe YMM. Confirm the vehicle, drivetrain, factory equipment, calibration, emissions eligibility, interfaces, and exact part number before ordering.

Are all supporting parts included?
Only components expressly listed for the exact manufacturer part number are included. Tuning, hardware, hoses, clamps, gaskets, adapters, wiring, fluids, and companion components may be separate.

Is tuning or calibration required after installation?
Requirements depend on the exact product and vehicle. Intake, fuel, boost, turbo, and engine-management changes may require a compatible calibration before operation.

Installation Instructions

Follow the current COBB and factory service instructions for this exact part number. Verify fitment, factory equipment, emissions eligibility, required calibration, software and firmware, interfaces, hardware, fluid or electrical connections, and clearances before installation. Inspect the completed work and confirm safe operation before full-load use.