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JCR Inconel Race Exhaust Manifolds for 981 Porsche Boxster Spyder / Cayman GT4 - Front View of Manifolds

JCR Inconel Race Exhaust Manifolds for 981 Porsche Boxster Spyder / Cayman GT4 - Front View of Manifolds

JCR Inconel Race Exhaust Manifolds for 981 Porsche Boxster Spyder / Cayman GT4

$11,980.00

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The JCR Inconel Race Exhaust Manifolds for the 981 Porsche Boxster Spyder and Cayman GT4 enhances both performance and sound. Made from high-performance Inconel, it reduces weight by over 6.5kg, improves throttle response, and increases power by approximately 28whp and 27wtq. This direct replacement upgrade delivers a more aggressive exhaust note and a straightforward installation process.

These items are typically not in stock and either made-to-order or special order from the manufacturer. After you order we will confirm the estimated lead time and other order details. If you have a specific deadline to receive this order please talk to us before placing your order to ensure that the manufacturer can meet your expectations.

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SKU: 981-1-IN-REM Categories: Exhaust, Headers Vehicle: PORSCHE, Porsche Boxster, Porsche Boxster Spyder, Porsche Cayman, Porsche Cayman GT4, Brand: JCR Developments

This item and any similar items are not CARB approved and therefore not for sale in the state of California or other states that require CARB certification. No assessment is being made regarding this product's compliance with the EPA's anti tampering policy, only that the necessary testing and validation has not been completed. Please check with your local enforcement officials regarding legality of use in your place of residence.

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Description

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Description

JCR Inconel Race Exhaust Manifolds for 981 Porsche Boxster Spyder / Cayman GT4

The JCR Inconel Race Exhaust Manifolds for the 981 Porsche Boxster Spyder and Cayman GT4 is designed to unlock even more of the iconic sound and performance from these already incredible machines. Known for their soulful, aggressive exhaust note straight from the factory, the 981 GT4 and Spyder models now have the opportunity to reach their full potential. Crafted from high-performance Inconel, a heat-resistant alloy used in motorsport, these manifolds replace the stock units, reducing weight by over 6.5kg (14.4lbs) while significantly improving throttle response. The result is a noticeable boost in power — approximately 28whp and 27wtq — along with a more pronounced, thrilling exhaust note that perfectly complements the driving experience. With a direct replacement design, installation is straightforward, requiring no additional modifications. For Porsche enthusiasts looking to enhance both performance and sound, these Inconel Race Exhaust Manifolds are the perfect upgrade.

Direct Replacement / Modular Fitment

The JCR Inconel Race Manifolds are a complete direct replacement for the OEM 981 GT4 and Spyder manifold assembly. No fabrication or additional parts are needed — simply remove the factory exhaust manifolds and install the JCR Inconel Race Manifolds.

Light Weight

Crafted from 100% Inconel, the JCR Inconel Race Manifolds offer a significant weight reduction compared to the factory exhaust setup, making this upgrade a true win-win modification.

Power Increase

Each component in the JCR exhaust line is engineered to enhance horsepower and torque, with results varying based on the specific combination of parts. By optimizing the primaries and collector design, JCR not only delivers a race-inspired, aggressive exhaust note but also dramatically improves exhaust flow, resulting in increased horsepower and torque.

Features

100% inconel construction
Direct replacement for OEM manifolds
6.52kg (14.37lbs) weight reduction vs OEM
Improved sound quality
Sold as a pair

Power Specifications

Horsepower:
- OEM: 370-380hp
- JCR: +32.34hp (+28.12whp)
Torque:
- OEM: 310ft-lbs
- JCR: +30.95ft-lbs (+26.91ft-lbs to the wheels)

Applications

Porsche Boxster Spyder: 981 (2015-2016) [3.8L F6 MA1.24]
Porsche Cayman GT4: 981 (2015-2016) [3.8L F6 MA1.24]

More JCR Exhaust Products for 981 Boxster / Cayman

About JCR Developments

JCR Developments is an engineering-led performance brand specializing in high-end exhaust and motorsport-derived upgrade solutions for marquee supercars and enthusiast platforms. Known for its expertise in advanced materials such as Inconel and lightweight stainless alloys, JCR focuses on reducing mass, improving thermal efficiency, and unlocking authentic, emotionally engaging sound without compromising drivability or OEM systems integration. Each component is designed through data-driven development, track-informed testing, and precision fabrication, resulting in products that deliver measurable performance gains alongside elevated craftsmanship. Serving discerning drivers, collectors, and professional build shops worldwide, JCR Developments combines technical rigor with boutique-level customer support to enhance the character, capability, and long-term enjoyment of iconic vehicles.

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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