The BORLA® sound of power. Its been described as asonic shot of adrenaline. An intoxicating concert ofsteel, gears and combustion that echoes from thespeedways, deserts and highways of the world.The sound of more victory laps than any otherbrand, the BORLA® exhaust note has become the quintessentioal soundtrack of high-performance motoring. And like all good automotive designs there is function behing the form. As any driving enthusiast knows, the sound of an exhaust provides more than just ear candy. Its a communications conduit between car and driver. A link between human and machine. The exhaust sound provides accoustic feedback of engine rpm to aid the driver in critical decisions such as gear selection or throttle input in rev-match shifting. At BORLA®, we understand this concept better than any exhaust manufacturer. Combining patented technology with computer modeling, extensive prototyping and advanced sound analysis tools. BORLA® engineers spend countless hours tuning exhaust systems to best reflect the personality and performance of vehicle applications. The result is an enhanced driving experience. With unrivaled clarity, the BORLA® exhaust note can help a driver stay within the powerband through a difficult section, using the exciting sensory feedback of sound. With unrivaled clarity the Borla exhaust note can help a driver stay within the powerband through a difficult section, using the exciting sensry feedback of sound.. This 3" diameter into dual 2.25" BORLA Cat-Back™ system is tuned for performance and sound for both the 2.0L engine in the WRX and the 2.5L engine in the STI. Our S-Type sound level is designed to bring out the Subaru Boxer engine rumble and provides an aggressive sound without the drone. This system features quad (2 per muffler) 3.5" round polished T-304 stainless steel tips, but is also available with high temperature black coated on T-304 stainless steel tips. For ease of installation, this Cat-Back™ is a direct bolt on part and does not require cutting. BORLA Cat-Back™ & Axle-Back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower. Increased exhaust velocity adds power, driving excitement, fuel economy, and the distinctive BORLA Sound of Power respected by motoring enthusiasts everywhere. Like all BORLA exhaust products, each system is handmade in the USA by master craftspeople and features premium, high-quality T-304 austenitic stainless steel construction, precision computer numerical control (CNC) manufacturing, ultra-smooth mandrel bent piping, and a Million-Mile Warranty.. ATAK Cat-Back™ Exhaust System 2015-2021 Subaru Impreza WRX/ WRX STI Sedan 2.0L/ 2.5L Turbo 4 Cyl. All Wheel Drive Automatic/ Manual Transmission 4 Door.. 2015-2021 Subaru Impreza WRX/ WRX STI Sedan 2.0L/ 2.5L Turbo 4 Cyl. All Wheel Drive Automatic/ Manual Transmission 4 Door.. Borla 15-16 Subaru WRX / STI 2.5L S-Type Cat-Back Exhaust Quad Rd RL Tips. Cat-Back™ Exhaust System - S-Type. Cat-Backâ„¢ ATAK System. Million Mile Warranty. Exhaust System Kit. Cat-Back System. ExhstSysKt

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