SOUL Performance Sport X-Pipe Exhaust System for 991 Porsche 911 Turbo & S

SOUL Performance Products’ Sport X-Pipe Exhaust System for the Porsche 991 Turbo replaces the factory rear exhaust with a full catted, free-flowing T304L stainless assembly designed to support serious power gains while giving the 3.8L twin-turbo flat-six the sharper, more exotic note it deserves all while reusing the OEM exhaust tips for a clean, understated factory look. A proprietary X-pipe with integrated mixing chamber, 3″ mandrel-bent tubing, and quad straight-through race resonators work together to reduce back pressure, increase exhaust velocity, and unleash a harder-hitting blend of turbo wail, flat-six bark, and tasteful pops and burbles on overrun, without introducing cabin drone or triggering a check engine light when used as intended. Built around premium HJS HD 200-cell catalytic converters that meet strict EURO 4 efficiency targets, the system flows substantially better than stock while maintaining reliability under sustained high-load use. Weighing roughly 14.4lb less than the OEM rear section (30.6lb vs 45lb), it trims mass from the back of the car for a more responsive feel. Each Sport X-Pipe is hand-crafted from .065″ wall T304L stainless, TIG welded, and fixture-tested for precise, direct bolt-on fitment with the factory catalyst sections and mounting points, allowing owners to keep their stock tips or any compatible OEM-style upgrade. Backed by SOUL’s renowned Lifetime Warranty for both street and track use, this “reuse OEM tips” configuration is the ideal choice for 991.1 and 991.2 Turbo owners who want a major step up in sound, flow, and future power headroom while preserving a subtle, factory-correct appearance.

Development & Testing

• SOUL Performance Products set out to develop an assertive catted system that provides a modest increase in tone, including enticing pops and burbles upon deceleration, all without triggering a check engine light. Another crucial consideration was ensuring support for high power, necessitating the use of 3″ tubing. In their pursuit, they conducted experiments with the inclusion of a mixing chamber in their X-pipe design. Analysis using 3D CAD software demonstrated a notable increase in velocity downstream of the mixing chamber within a range of measured pressure and temperature levels. This facilitates optimal flow characteristics, reduces backpressure to enhance higher horsepower output, and elevates the system’s sound quality. Including quad race resonators plays a discernible role in minimizing drone while encouraging a more refined exhaust note. Furthermore, the system was designed with modularity in mind, allowing for the ease of tip replacement, conversion back to factory catalytic converters, or the option to add their race cat pipes at any desired time.

Construction

• Crafted with precision, each Sport X-Pipe Exhaust System is constructed from mandrel bent T304L stainless steel tubing, boasting a diameter of 3″ and a wall thickness of .065″. The system incorporates straight-through race resonators featuring a full metal packing design, ensuring exceptional durability. Laser-cut brackets are employed to guarantee impeccable fitment. For a personalized touch, you have the freedom to choose from a selection of hand-finished tip options, allowing you to select the appearance that best complements your 991. Alternatively, you can opt to reuse your factory tips.

HJS Catalysts

• SOUL Performance Products utilizes the finest catalytic converters available, renowned for their exceptional flow and durability within the industry. These converters exhibit outstanding efficiency, meeting stringent EURO 4 emission standards while enabling increased flow without triggering a check engine light. The HD design incorporates premium triple foil winding, ensuring maximum strength. Moreover, the inclusion of a brazing stripe serves as an additional feature to enhance durability by preventing core movement or damage during sustained high horsepower abuse. SOUL Performance Products deliberately employs a large and appropriately sized catalyst to enable maximum gains, leaving no room for compromises.

Sound

• The HJS catalytic converters exhibit exceptional flow characteristics, allowing for the passage of an increased amount of turbo and flat-six sound. The addition of quad resonators contributes to a refined tone and effectively reduces droning in the cabin. The volume level is perfectly suited for owners seeking a sophisticated sound enhancement, delivering a notably aggressive tone during heavy throttle inputs while maintaining a mild and sporty presence during cruising.

Bolt On & Go

• Every exhaust undergoes meticulous testing in a dedicated fixture to ensure impeccable fitment. Following this, each exhaust is carefully foam packed to guarantee its pristine condition upon arrival. Furthermore, the package includes comprehensive installation instructions, providing step-by-step guidance for a straightforward installation process that can be easily performed by most DIY enthusiasts.

Features

• Full 3″ free-flowing T304L stainless Sport X-pipe with integrated mixing chamber
• Quad straight-through race resonators for refined tone and reduced drone
• Uses premium HJS HD 200-cell cats for high flow, EURO 4 efficiency, and no CEL when used as intended
• 14.4lb weight reduction over the factory rear exhaust
• Direct bolt-on fitment, hand-built and TIG welded, backed by SOUL’s Lifetime Warranty

Applications

• Porsche 911 Turbo: 991.1 (2012-2019)
  [3.8L F6 twin-turbo]
  
• Porsche 911 Turbo S: 991.1 (2012-2019)
  [3.8L F6 twin-turbo]
  

Notes

• Please be aware that this specific product does not possess CARB certification and may not comply with legal requirements for usage on emissions controlled vehicles. It is intended exclusively for closed course competition use.
• Reuses OEM exhaust tips

About SOUL Performance

SOUL Performance Products was founded by a group of automotive enthusiasts with deep industry experience and a commitment to doing right by their customers. Their mission is to deliver outstanding performance parts at fair pricing, backed by quality service and one of the best warranties in the industry. SOUL develops high-performance exhaust systems and components that are engineered for exceptional sound and proven performance, with products ready to ship quickly worldwide. Guided by core values of honesty, transparency, and passion for cars, they build strong community connections and prioritize customer satisfaction at every step. Operating out of a dedicated facility in Willow Grove, Pennsylvania, SOUL combines hands-on research, engineering, and manufacturing expertise to create parts that meet and exceed the demands of serious enthusiasts.