STI Cat-Back Exhaust, WRX Catback, Borla Hush Exhaust

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Description

This WRX/STI cat-back exhaust delivers power while keeping the sound quieter than most cat-backs available. Order the Borla Hush exhaust at .

Borla® Cat-Back™ Axle-Back exhaust systems feature patented straight-through and multi-core technology designed 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

Each system is built from premium T-304 stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer-controlled CNC manufacturing ensures an accurate fit

Best of all, Borla stands behind every system with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Catback Exhaust System - Un-Resonated - 11-14 WRX, 08-14 STI Hatchback - GrimmSpeed

Borla Performance offers a quad-exit Catback exhaust for the venerable 2008-2014 Subaru WRX STI. This race-inspired system (PN140312) checks all the boxes on every Subaru enthusiasts hit list, taking this flagship to an even higher realm, of performance. For starters, Borla engineers upgraded the Stir's exhaust plumbing from 2.5 to 3 diameter. The resulting increased airflow through the turbocharged powerplant provides horsepower gains of 7% - 10%.