2021 SUBARU WRX STI Exhaust Systems

Borla S-Type Cat-Back Exhaust Systems

Borla S-type cat-back exhaust systems feature patented straight-through and multi-core technology to unleash hidden horsepower and produce a more aggressive sound and higher flow. 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 300-Series austenitic 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 and power, and precision computer-controlled CNC manufacturing ensures an accurate fit. It's just what you'd expect from the world's most experienced (and most winning) exhaust brand.

4.79 out of 5 stars ( 940 )

$1,799.99

XForce Exhaust Systems

Performance is most important, but looks ... well, they're important, too. XForce exhaust systems are uniquely engineered and designed to deliver both desires, plus great audio notes. These direct-fit components are fabricated from 304 stainless steel and offer unrestricted flow to fit your ride with increased power, bolder sound, and fabulous looks. You'll have what you want for your car or truck with an easy, bolt-on upgrade XForce exhaust system. Order the size, style, and configuration recommended for your application.

4.21 out of 5 stars ( 66 )

$539.10

On Sale

aFe Takeda Exhaust Systems

aFe Takeda exhaust systems are constructed of superior quality mandrel-bent 304 stainless steel and are designed to produce significant horsepower gains. They utilize single and dual, high-flow transverse mufflers. Some models include an X-pipe balance tube, which equalizes and evenly distributes exhaust pulses for increased flow and performance across the power band, while maintaining great sound. The finishing touches on these exhaust systems are their laser-etched, slash-cut polished 304 stainless steel tips. Many options are available, such as cat-back and rear axle-back styles; exit quantity and location; and tailpipe diameters. Order the kit designed for your vehicle application.

4.53 out of 5 stars ( 17 )

$1,852.00

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$2,135.00

$1,574.20

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$1,814.75

Mishimoto Subaru WRX/STI Cat-Back Exhausts

Mishimoto Subaru WRX/STI cat-back exhausts allow your entire system to breathe easier, providing horsepower, torque, and a rich exhaust tone. Stainless steel construction, an easy install, and dyno-proven gains, these exhausts are Mishimoto's solution to your stock system's lack of aggressive tone with an added performance bonus. Features include: * Direct-fit for the 2015-19 Subaru WRX/STI * Extremely aggressive turbo and exhaust tone under acceleration and boost * Mates with the Mishimoto, stock, or most aftermarket downpipes * Installs in under an hour * Designed with oval mufflers to prevent highway drone * Quad 3.5 in. staggered double wall, polished tips * Full 304 stainless steel, mandrel-bent construction * 3 in. to 2.25 in. exhaust split helps maintain proper exhaust velocity * Clamps, gasket, and stainless steel hardware * TIG-welded to perfection * Mishimoto Lifetime Warranty

Not Yet Reviewed

$1,326.95

COBB Tuning Exhaust Systems

COBB Tuning exhaust systems—whether turbo-back or cat-back—feature bolt-on installation of components with outstanding build-quality, along with the potential for excellent power gains and impressive exhaust notes. Each system offers additional features designed to gain the most performance for your specific application. COBB turbo-back systems include cat-back exhaust and downpipe. Order the kit recommended for your vehicle. Typically, COBB Tuning exhaust systems feature: * 304 stainless steel construction for corrosion resistance (some models are titanium) * Mandrel-bent tubing * TIG welds * Beautifully polished tips * High-flow catalytic converter * Muffler * Resonator * Flange gaskets and hardware * Tips and mufflers with COBB logo

5.0 out of 5 stars ( 1 )

$2,450.00

MagnaFlow xMOD Series Performance Exhaust Systems

MagnaFlow xMOD Series performance exhaust systems offer unrivaled exhaust performance! These revolutionary, fully modular exhaust systems will allow you to easily personalize and fine-tune to the power and sound you want. They also offer the benefits that MagnaFlow premium exhaust is known for—lifetime warrantied stainless steel construction and dyno-proven performance featuring straight-through mufflers and fast-flowing mandrel bent pipes. Together with the xMOD modules and deletes that provide configurable flow and sound levels, your vehicle's exhaust moves to the next level with support for your present—and future power needs. The power and sound is yours with MagnaFlow xMOD Series premium performance exhaust systems. MagnaFlow xMOD Series features: * xMOD muffler modules offer MagnaFlow's proven straight-through design and race-bred quick-release V-band clamps for quick installation and removal for when you want that race car sound, instead of the deep, aggressive signature MagnaFlow exhaust note * xMOD xTreme deletes are equipped with the same quick-release V-band clamps allowing for the removal of the muffler modules for that xTreme sound experience. Use of the xTreme deletes is recommended for track use only. * Opti-Flow modules feature a fast-flowing mandrel-bent stainless steel design optimized for stock power, plus minor modifications * xTreme Flow modules feature increased flow capacity mandrel-bent big bore design for big power modification support

5.0 out of 5 stars ( 1 )

$1,575.00