One of the best ways to extract some extra horses out of your WRX, STi or Forester GT is to replace the standard exhaust system with an RMS 3" Stainless Steel full exhaust system. This unit is comprised of a 3" dump pipe with unique splitter design, mated to a 3" high flow metal catalytic converter, and finishing off with a stainless steel oval muffler with 4" tip. The system can be fitted up in a day or whilst you wait - usually a 2 to 3 hour operation. Aside from the extra kilowatts you will gain from such a system, you'll also be freeing up that unique boxer engine note that is strictly Subaru. RMS exhaust systems can be customised to any requirements if there are certain aspects you would like changed on your system.
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Exhaust 
