Do the SOUL Competition Headers for 981 fit my Boxster Spyder or Cayman GT4?

Yes. These headers fit the 981 Porsche Boxster Spyder and Cayman GT4 from 2015 to 2016, and the Cayman GT4 Clubsport from 2016, all with the 3.8L flat-six. SOUL built a dedicated 981 application and fixture-tests every set, so the Competition Headers for 981 are a direct bolt-on designed to fit without cutting or fabrication.

How much power do they add?

On a Dyno Dynamics dynamometer, the setup gained roughly 40 whp with a supporting tune, and the Competition Headers contributed about 20 whp on their own after the car was tuned. Actual numbers depend on your tune and the rest of your exhaust, but the free-flowing long-tube design is what makes the larger gains possible.

How do they compare to the Street Headers?

The Competition Headers are the more aggressive, track-focused option, with higher flow and a harder voice, and they may trigger a check engine light. The SOUL Long Tube Street Headers are the street-focused choice that keeps the check engine light off. If you spend most of your time on the road, start with the Street Headers; if the car lives at the track, the Competition Headers free up the most flow.

A tune is not required to install the headers, but most owners add one. A supporting tune unlocks the full gains, and the headers contribute about 20 whp after tuning while the complete setup reached around 40 whp on the dyno. A custom tune can also address the check engine light for off-road and track use.

What are the headers made from?

They are built from T304L stainless steel with port-matched flanges, smooth-radius primary tubing, and flow-optimized collectors, hand-assembled and quality-checked in SOUL's shop. The 2-inch long-tube runners are sized for high flow and sustained high-RPM use. Every set is fixture-tested for fitment and carries SOUL's lifetime warranty to the original owner for street and track use.

Are these street legal?

No. The Competition Headers are not CARB certified and are intended for off-road and competition use only; they are not legal for sale or use on pollution-controlled vehicles in California or other CARB states. They may trigger a check engine light. Emissions legality depends on your state, so check your local rules before installing.

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Description

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

SOUL Performance’s Competition Headers for 981 Porsche Boxster Spyder and Cayman GT4 are the track-focused upgrade for owners who want everything the 3.8L flat-six has to give. Free-flowing 2-inch long-tube runners and flow-optimized collectors cut restriction and lower under-car temperatures, sharpening throttle response and giving the flat-six a harder, more guttural voice as the revs climb. SOUL hand-assembles each set in Willow Grove, Pennsylvania from T304L stainless steel, with port-matched flanges and smooth-radius primary tubing sized specifically for the 981 at sustained high RPM. On a Dyno Dynamics dynamometer, the setup returned roughly 40 whp with a supporting tune, with about 20 whp coming from the headers alone once the car was tuned. Every set is fixture-tested for fitment and backed by SOUL’s lifetime warranty, built for the driver who takes the 981 where it belongs.

Development

SOUL built a dedicated 981 application, sizing the runners and collectors for the 3.8L flat-six and for the airflow demands of sustained high-RPM operation. On a Dyno Dynamics dynamometer, third-party testing recorded roughly 40 whp of gain with a supporting tune, of which about 20 whp came from the headers alone after the tune was applied (gains vary with the rest of the exhaust and the tune). The free-flowing long-tube design is what opens the door to those numbers.

Construction

Each set is built from T304L stainless steel with port-matched flanges, smooth-radius primary tubing, and collectors shaped to optimize exhaust flow, then hand-assembled and quality-checked in SOUL’s own shop. The 2-inch long-tube runners are engineered for high flow and lower under-car temperatures at sustained track pace. Every unit is fixture-tested for correct fitment and foam packed before it ships.

Bolt On and Go

The headers install as a direct bolt-on with instructions included, and SOUL backs fitment with a guarantee. O2 spacers and an OEM header gasket can be added to the order so you have the right hardware on hand for the install.

Features

Free-flowing, track-focused long-tube design
2-inch primary runners with flow-optimized collectors for the 3.8L flat-six
Up to roughly 40 whp with a supporting tune, about 20 whp from the headers alone after tuning
Sharper throttle response, a harder flat-six voice, and lower under-car temperatures
T304L stainless steel with port-matched flanges and smooth-radius tubing
Sized for sustained high-RPM track use
Fixture-tested for fitment, hand-assembled, quality-checked, and foam packed
Direct bolt-on with instructions included
O2 spacers and OEM header gasket available as add-ons
SOUL lifetime warranty to the original owner

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

Frequently Asked Questions

Do the SOUL Competition Headers for 981 fit my Boxster Spyder or Cayman GT4? Yes. These headers fit the 981 Porsche Boxster Spyder and Cayman GT4 from 2015 to 2016, and the Cayman GT4 Clubsport from 2016, all with the 3.8L flat-six. SOUL built a dedicated 981 application and fixture-tests every set, so the Competition Headers for 981 are a direct bolt-on designed to fit without cutting or fabrication.
How much power do they add? On a Dyno Dynamics dynamometer, the setup gained roughly 40 whp with a supporting tune, and the Competition Headers contributed about 20 whp on their own after the car was tuned. Actual numbers depend on your tune and the rest of your exhaust, but the free-flowing long-tube design is what makes the larger gains possible.
How do they compare to the Street Headers? The Competition Headers are the more aggressive, track-focused option, with higher flow and a harder voice, and they may trigger a check engine light. The SOUL Long Tube Street Headers are the street-focused choice that keeps the check engine light off. If you spend most of your time on the road, start with the Street Headers; if the car lives at the track, the Competition Headers free up the most flow.
Do I need a tune? A tune is not required to install the headers, but most owners add one. A supporting tune unlocks the full gains, and the headers contribute about 20 whp after tuning while the complete setup reached around 40 whp on the dyno. A custom tune can also address the check engine light for off-road and track use.
What are the headers made from? They are built from T304L stainless steel with port-matched flanges, smooth-radius primary tubing, and flow-optimized collectors, hand-assembled and quality-checked in SOUL’s shop. The 2-inch long-tube runners are sized for high flow and sustained high-RPM use. Every set is fixture-tested for fitment and carries SOUL’s lifetime warranty to the original owner for street and track use.
Are these street legal? No. The Competition Headers are not CARB certified and are intended for off-road and competition use only; they are not legal for sale or use on pollution-controlled vehicles in California or other CARB states. They may trigger a check engine light. Emissions legality depends on your state, so check your local rules before installing.

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 and Cayman GT4 [POR.GT4.COH]

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

Development

Construction

Bolt On and Go

Features

Applications

Notes

Frequently Asked Questions

About SOUL Performance

Reviews