Soul Long-Tube Street Headers for Porsche 981 Boxster, GT4, and Spyder (2015–2016)

Description

Soul Performance’s Long-Tube Street Headers for the 981 Porsche GT4 / Boxster Spyder significantly improve exhaust flow with a performance-tuned design that boosts throttle response and adds a richer, more aggressive flat-six tone. Featuring free-flowing, long-tube runners matched to large, high-quality catalytic converters, these headers offer real-world gains while being safe for combined street and track use. Built from T304L stainless steel and backed by a lifetime warranty, they’re a premium, bolt-on upgrade that won’t compromise reliability.

Fitment Notes

• Fits Porsche 981 GT4, 981 Boxster Spyder, and 981 Clubsport (2015–2016)

• Direct-bolt installation: designed to work with OEM exhaust flanges and mounting points. 

• Includes “sport”-density catalytic converters; designed to avoid triggering a check-engine light. 

• Not CARB-certified; not guaranteed legal for emissions-controlled applications. 

• Intended for street and track use; because of long-tube design, ensure adequate clearance and proper heat shielding.

Included

• Left and right long-tube header assemblies in T304L stainless steel 

• High-flow catalytic converters (as part of the header assembly)

• Mounting hardware

• Installation instructions / fitment guide

• Soul Performance lifetime-warranty documentation (headers covered for street + track)

Product Specs

• Material: T304L stainless steel for high strength and corrosion resistance.

• Runner size: ~2″ primaries (per Soul’s development notes) to optimize flow on the 3.8 L flat-six. 

• Third-party dyno results: ~+30 whp when paired with a tune; ~+12 whp gained from the headers alone (after tuning) according to Soul. 

• Construction: Port-matched flanges, smooth-radius bends, and optimized collectors to maximize flow. 

Product Features

• Performance-Oriented Design – Long-tube layout and large C-cats improve flow for better response and power.

• High-Quality Materials – T304L stainless steel ensures durability and resists corrosion over time.

• Street & Track-Ready – Designed to deliver a meaningful performance bump while retaining reliability.

• Improved Sound – Enhances exhaust tone with more growl and presence, especially under load, without extreme drone.

• Proven Reliability – Built in-house at Soul’s US facility and backed by a lifetime warranty, giving confidence in both performance and longevity.

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