Agency Power Catback - Dual 4" Titanium Tips (08+ WRX/STI)

** Discontinued **



  • Aggressive Exhaust Note
  • Dyno Proven Performance 17 AWHP and 28ft/lbs gain
  • 3³ T304 Stainless Steel Piping
  • Resonated Mid-pipe
  • High-Flow Y-Pipe
  • Available in either 4³ Dual Titanium tips or Dual 4³ Stainless Steel Tips


Based out of Gilbert, Arizona, Agency Power has established itself as one of the core aftermarket companies for niche tuner products. Agency Power is constantly developing new functional and race proven products. With dealers worldwide, the AP brand is recognized and trusted. Beyond the USA, Agency Power can be found in regions such as Singapore, Canada, Australia, South Africa, Russia, United Kingdom, and other parts of the EU. Innovative products such as multi adjustable control arms, valvetronic exhaust systems, and roto-molded intakes kits, give Agency Power an edge to truly make a difference on your performance vehicle.  Agency Power manufacturers its products only after indepth product testing, racing, and quality checks are completed. AP parts have been featured in magazines, videos, and customer competition events worldwide.

The Agency Power Catback Exhaust System for the 2008-2017 Subaru WRX & STI is now available in a dual 4³ tip configuration that offers performance and sound that is unsurpassed! The system is manufactured using T304 stainless steel piping in 3 inch diameter from the catback. The piping is all hand polished featuring beautiful TIG welds throughout the entire system. The mid-pipe includes a resonator that aids in keeping the traditional boxer engine sounding mean and aggressive, while being drone free! The ? inch thick flanges provide precision fit and a secure fit along with the factory placement exhaust hangers. The catback exhaust uses a high flow Y-Pipe to efficiently direct exhaust gas to the dual exhaust canisters. The Y-pipe features a merged collector and 3³ inch piping on each extension. The straight through mufflers are designed to optimize horsepower with very little restriction. The mufflers do feature removable exhaust silencers for those wanting the ability to keep the system very quiet during daily use. The exhaust is available in either 4³ Stainless Steel tips or 4³ Dual Titanium Tips!

As tested on a Mustang all wheel drive dyno, the Agency Power catback exhaust made an impressive 17 all wheel horsepower and 28ft/lbs of torque. The exhausts are available for all 2008-17 Subaru WRX | STI Sedans.


Vehicle Fitment

  • 2008 - 2017 Subaru WRX
  • 2008 - 2017 Subaru STI


warning_symbolWARNING: Operating, servicing and maintaining a passenger vehicle or off-road vehicle can expose you to chemicals including engine exhaust, carbon monoxide, phthalates, and lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. To minimize exposure, avoid breathing exhaust, do not idle the engine except as necessary, service your vehicle in a well-ventilated area and wear gloves or wash your hands frequently when servicing your vehicle. For more information go to

More Information
Product Type Intake and Exhaust
Intake and Exhaust Exhaust
Brand Agency Power
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