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Description

SOUL Performance Competition Headers for 981 Porsche Boxster Spyder & Cayman GT4

The SOUL Performance Products Competition Headers for the Porsche 981 GT4, Boxster Spyder, and Clubsport are designed to replace the heavy, restrictive factory manifolds with a free-flowing, track-focused header set that improves engine response, reduces operating temperatures, and amplifies the high-strung flat-six character the GT4 is known for. Built as a dedicated 981 application with properly sized 2-inch runners and optimized collectors, these headers are engineered to extract maximum power from the 3.8L platform, with SOUL noting power gains of over 20 whp. Third-party Dyno Dynamics testing showed gains of 40whp when paired with a tune, with 20 whp attributed to the Competition Headers alone after the tune was applied. Constructed from T304L stainless steel, the design incorporates port-matched flanges, smooth-radius primary tubing, and flow-optimized collectors to maximize exhaust efficiency. Each set is rigorously quality-checked, fixture-tested for precise fitment, foam packed for shipping, and supplied with thorough installation instructions for a direct bolt-on installation

Development

SOUL Performance developed a dedicated application for the 981 platform, focusing on properly sizing the 2-inch runners and collectors to extract maximum power from the 3.8L engine. Appropriately sized catalytic converters were selected to support the airflow demands of sustained high-RPM operation, exactly where the GT4 thrives without compromising durability. In third-party Dyno Dynamics testing, gains of 30whp were recorded when paired with a tune, with an additional 12 whp attributed to the Street Headers alone after the tune was applied.

Construction

SOUL Performance developed a dedicated 981 application, focusing on properly sizing the 2-inch runners and collectors to extract maximum power from the 3.8L engine. In third-party Dyno Dynamics testing, gains of 40 whp were recorded when paired with a tune, with an additional 20 whp attributed to the Competition Headers alone after the tune was applied.

Bolt On and Go

Each SOUL Performance product is test-fit in a dedicated fixture to verify precise fitment. Detailed installation instructions are included for a straightforward install that most DIY enthusiasts can complete.

Features

Track-focused competition header design
2-inch runners with optimized collectors
T304L stainless with port-matched flanges and smooth-radius primaries
Improved response, reduced temps, and amplified flat-six sound
Quality-checked, fixture-tested, foam packed, bolt-on with instructions

Applications

Porsche Boxster Spyder: 981 | 2015-2016 | 3.8L F6
Porsche Cayman GT4: 981 | 2015-2016 | 3.8L F6
Porsche Cayman GT4 Clubsport: 981 | 2016 | 3.8L F6

Notes

This product may trigger a check engine light
This product is not CARB certified and may not be legal for use on emissions controlled vehicles; intended for off road use only due to removal of factory catalytic converters
United States based customers purchasing this product are required to sign our race Exhaust Component Waiver here.

Frequently Asked Questions

Does SOUL Performance make competition headers for the 981? Yes. The SOUL Performance 981 Competition Headers is built by SOUL Performance for the 981 Porsche Boxster Spyder Cayman GT4.
Which models does this fit? The Competition Headers is engineered for the 981 Porsche Boxster Spyder Cayman GT4. Fitment is specific to the chassis and model years listed in the Applications section above.
How does it change the sound? SOUL engineers the Competition Headers to sharpen tone and character while controlling unwanted resonance. The final sound depends on the rest of your setup.
Is an ECU tune required? A tune is not required to fit the Competition Headers. Many owners add a tune to maximize the gains.
How is it constructed? SOUL builds the Competition Headers from durable mandrel-bent stainless steel with precise, fixture-tested fitment.
Is professional installation recommended? Yes. We recommend installing the Competition Headers through a qualified technician to ensure correct fitment and a proper seal.

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.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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SOUL Performance Competition Headers for 981 Porsche Boxster Spyder & Cayman GT4 [POR.GT4.COH/POR.GT4.COHO2]

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SOUL Performance Competition Headers for 981 Porsche Boxster Spyder & Cayman GT4

Development

Construction

Bolt On and Go

Features

Applications

Notes

Frequently Asked Questions

About SOUL Performance

Reviews