Agency Power
Ti Tip Cat-Back Exhaust System
Subaru WRX Wagon '08 And Newer
Agency Power has developed one of the best-sounding and best-performing exhaust systems for the '08 and newer Subaru WRX wagon. The new exhaust features T304 stainless steel and 3-inch-diameter piping from the cat-back. The piping is all hand polished and features robotic TIG-welding.
MSRP: $850

Borla Performance
Cat-Back Exhaust System
'04-'07 WRX STI
Made of T304 stainless steel, it also has a single-exit, 4-inch round, rolled edge, and an angle cut tip. The muffler uses their patented XR-1 multi-core design

MSRP: $750.99

5Zigen USA
ProRacer A-Spec
'04-'07 WRX/STI
The flagship of the ProRacer cat-back systems, full stainless mandrel-bent piping with Inconel 600 burned tip, achieves a high balance of power, response, and comfort.MSRP $1,000

Perrin Performance
STI Cat-Back Exhaust
'08 Subaru WRX STI
It has 3-inch plumbing to maximize performance along with a resonated center section to prevent drone on the freeway. It bolts to OEM downpipe.
MSRP: $829.99

Tanabe Racing Development
Concept G
The Concept G is an all-new motorsports-developed exhaust system, featuring high-power benefits while maintaining responsible sound levels. Using the all-new continuous strand Advantax packing material technology, Concept G achieves extremely high levels of exhaust system efficiency and maintains a street-driveable, extremely clean sound output under 93dB. Specially engineered for use on Tanabe exhaust systems, a piping wall diameter of 1.2mm was developed, allowing weight to be significantly reduced and remain durable for extended usage.
MSRP: $840

Borla Performance
Cat-Back Exhaust System
'08 Subaru Impreza WRX Sedan
It is made of T304 stainless steel, split rear, 4-inch round rolled edges, and angle cut tips. The system weighs 32 pounds, compared to the 44 pounds the factory system weighs.
MSRP: $1,299.99

DC Sports
Turbo manifold
DC Sports turbo manifolds are the perfect upgrade for customers looking to extract the most power from their factory turbocharged vehicle. Because of the high-temperature demands of turbo applications, they use special manufacturing techniques to virtually eliminate failure.
MSRP:$721.99 (brushed stainless steel)$823.75 (polished stainless steel)

Cobb Tuning
The Cobb Tuning turbo downpipe is one of the premiere modifications that most owners look to upgrade on their vehicle. By opening the diameter of exhaust flow coming out of the turbo, the downpipe unleashes power where the stock-restrictive unit lacks. The Cobb downpipe is available in a "street" version that comes with a single high-flow catalytic converter.
MSRP: $595

AMS Performance
Cat-Back Exhaust System
'04-'07 WRX/STI
The AMS Subaru Impreza WRX STI 3-inch, mandrel-bent cat-back exhaust system is constructed of a TIG-welded, 100 percent 304 stainless steel, mandrel-bent tubing, providing you with a corrosion free, high-flowing exhaust. The system utilizes all of the factory exhaust hangers and includes a high-quality muffler with a single 4-inch tip.

DC Sports Downpipe
DC Sports competition pipes delete the catalytic converter to eliminate restriction in the exhaust path and are dyno-tuned to deliver incredible performance gains for your factory turbocharged vehicle.
MSRP: $349.99