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Toyota GT86 Cat-Back Exhaust: Flow and Horsepower Gains

Cat-back exhaust systems for the Toyota GT86 (and Subaru BRZ equivalent) deliver targeted flow improvements and horsepower gains by replacing the factory rear exhaust section with unrestricted, lightweight designs that enhance the FA20 boxer's high-revving nature. Starting immediately after the catalytic converters, these upgrades minimize backpressure in the mid-to-rear piping, sharpen throttle response, and boost top-end power where the GT86 thrives—above 5000 RPM—without affecting emissions compliance. Enthusiasts achieve 8-20 wheel horsepower increases alongside addictive flat-four sound, transforming the car's playful dynamics into something truly exhilarating.

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Dominate Tracks Using AWE Touring STI Exhaust System

The Subaru WRX STI is a track dominator, blending turbocharged EJ25 power with razor-sharp AWD handling. Yet, its stock exhaust restricts flow and mutes the boxer roar, holding back true potential. The AWE Touring STI Exhaust System unleashes this fury with dyno-proven gains, rasp-free tone, and precision engineering—perfect for conquering circuits while remaining street-legal.​

Why AWE Touring Excels for STI Track Domination
Proudly made in the USA, the AWE Touring Edition cat-back is tailored for EJ25-equipped WRX STI models (2011-2021 sedan/hatch). It delivers max gains of 11 hp and 11 ft-lbs at the wheels through unrestricted 3-inch mandrel-bent T304 stainless steel piping—twice the thickness of competitors for leak-proof durability. Unlike raspy alternatives, its patented drone-canceling Helmholtz resonators ensure aggressive boxer tone without fatigue on long sessions.​​

This balance makes it ideal for track days: explosive turbo spool, consistent power, and a soundtrack that motivates lap after lap. Owners praise its versatility—civil for commutes, ferocious under boost.​
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