SOUL Performance Sport Downpipe for 982 Porsche 718 Boxster & Cayman

SOUL Performance Sport Catalytic Converter Downpipe for the Porsche 718 Boxster and Cayman wakes up the turbocharged flat-four with more power, quicker response, and a far more engaging soundtrack, all while retaining emissions hardware and avoiding check engine lights. Designed as a direct bolt-on for all 2017+ 718 Boxster and Cayman models, this high-flow HJS HD 200-cell catalytic converter downpipe replaces the restrictive factory unit with thick-wall, mandrel-bent T304L stainless tubing that tapers from 90 mm at the turbo outlet to dual 55mm exits, reducing back pressure and sharpening throttle response. Independent dyno testing has shown repeatable peak gains of 14 whp and 24 ft-lb of torque, with a notable midrange punch that you can feel every time you roll into the throttle. The result is a deeper, more urgent exhaust note with extra turbo spool and crackle, but without harshness, fumes, or unwanted CELs. Each downpipe is back-purged TIG welded, rigorously quality-checked, fixture-tested for precise fitment, and foam packed with new hardware and detailed instructions, all backed by SOUL Performance’s Lifetime Warranty (with a 3-year warranty on the HJS catalyst) for confident use on both street and track.

Development & Testing

• In its factory configuration, the 718 model tends to be relatively quiet. However, by substituting the restrictive stock catalytic converter with a high-performance alternative, both the drivability of the vehicle and the captivating turbo sounds can be significantly enhanced. Importantly, this upgrade does not introduce any unfavorable elements to the overall exhaust tone. The inclusion of the HJS HD 200-cell catalytic converter, along with the incorporation of smooth mandrel bent piping ranging from 90mm to dual 55mm outlets, promotes improved throttle response and delivers a more exhilarating exhaust note. This bolt-on solution is remarkably easy to install, requiring no modifications, and offers the advantage of being reversible. Overall, it serves as an excellent choice to make your Boxster or Cayman a more thrilling driving experience.

Construction

• Every individual downpipe is meticulously assembled using mandrel bent T304L stainless steel, characterized by its robust wall thickness. Following the assembly process, rigorous quality checks are carried out to ensure adherence to the highest standards. To guarantee exceptional weld quality and longevity, back purged TIG welding techniques are employed, ensuring optimal weld penetration.

HJS Catalysts

• The catalytic converters utilized are of the utmost quality, renowned for their industry-leading flow characteristics and exceptional durability. These converters exhibit impressive efficiency, enabling compliance with stringent EURO 4 emission standards while simultaneously facilitating an increase in flow, all while ensuring that no check engine light is triggered. The HD design incorporates premium triple foil winding, maximizing its strength and resilience. As an additional measure to enhance durability, a brazing stripe is included, effectively preventing the core from shifting or sustaining damage even under sustained high horsepower abuse. The 200-cell design features a premium wash coat of precious metals, ensuring a high level of catalytic effectiveness even with the increased exhaust flow.

Power

• Verified independent dyno testing conducted at Growler Motor Labs has unveiled conclusive and repeatable peak gains of 14whp and 24ft-lbs of torque. Notably, these gains are accompanied by a noticeable improvement in the mid RPM range, further enhancing the performance characteristics of the vehicle.

Bolt On & Go

• Every individual downpipe undergoes a rigorous quality-checking process to maintain the highest standards. Additionally, each downpipe is meticulously tested in a fixture to ensure perfect fitment. To safeguard its pristine condition during transportation, the downpipe is carefully foam packed. Furthermore, new hardware specifically designed for the two bolt flanges is included, simplifying the installation process. Thorough and comprehensive installation instructions are thoughtfully provided in the package, making it a straightforward task that can be easily accomplished by most DIY enthusiasts.

Features

• 90 mm to dual 55 mm thick-wall T304L stainless tubing to cut back pressure and sharpen throttle response
• Peak power gains of 14whp and 24ft-lbs of torque
• Added performance and tone without a check engine light
• Weighs 4.7lbs less than factory exhaust components
• Direct bolt on installation
• All SOUL Performance Products components are backed by a renowned lifetime warranty (3-year warranty on the HJS catalyst)

Applications

• Porsche 718 Boxster: 982 (2016+)
  [2.0L F4 turbo]
• Porsche 718 Cayman: 982 (2016+)
  [2.0L F4 turbo]
  

Notes

• Please note that this particular product does not possess CARB certification and may not comply with legal requirements for use on emissions controlled vehicles. It is designed and intended solely for off-road usage.

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.