SOUL Performance Race Exhaust System with WEISSACH Tips for 982 Porsche 718 Cayman GT4 RS / Spyder RS

Development and Testing

• The factory rear muffler was not much of a restriction on the standard 718 GT4, but carrying it over to the GT4 RS creates a bottleneck for the GT3-derived engine. Tubing diameter remains unchanged, forcing the added power through tubing that measures under 2 1/4 inches. While repurposing that muffler can help meet sound restrictions and streamline manufacturing, it does not extract the full performance potential of the GT4 RS. SOUL Performance’s Race Exhaust system is built with a true 3-inch diameter from the flanges to the tips, unlocking every bit of character from the 4.0-liter flat-six. A bespoke X-pipe sharpens the note with a crisp motorsports tone. For improved cabin comfort, the Resonated version targets drone below 2500 RPM using resonators and integrated anti-drone tubes.

Construction

• Each system is assembled in-house in the USA from mandrel-bent, thick-wall 0.065-inch T304L stainless steel. Back-purged TIG welding with ARCAL Prime argon gas ensures proper weld penetration and long-term durability. Water-jet cut flanges are produced to ISO 9001:2015 standards with tolerances of +/- 0.003 inches for exceptional precision. SOUL Performance fabricates these over axle pipes using thick-gauge aluminum fixtures that act as an effective heat sink during welding, helping prevent warping of both the components and the fixtures to maintain consistent, accurate fitment.

Features

• True 3-inch diameter from flanges to tips
• Bespoke X-pipe for a crisp motorsports tone
• Optional Resonated configuration to reduce drone below 2500 RPM
• Mandrel-bent, thick-wall 0.065-inch T304L stainless steel construction
• Back-purged TIG welds with ARCAL Prime argon for durability
• ISO 9001:2015 water-jet cut flanges with +/- 0.003-inch tolerances
• Fixture-built fabrication to prevent warping and ensure precise fitment

Applications

• Porsche 718 Cayman GT4 RS: 982C | 2022-2025 | 4.0L F6
• Porsche 718 Spyder RS: 982 | 2024-2025 | 4.0L F6

Notes

• Additional options and tips are available here

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.