Description
Descriptions:
Why We Choose HJS Catalytic Converters:
HJS German imported catalytic converters are made from some of the highest grade materials you can find in a catalytic converter. This yields high performance gains and longevity so it wont deteriorate over time like lower grade catalytic converters. These catalytic converters flow up to 93-95% of a straight pipe in most applications. The benefit is that you get the “straight pipe sound” while still being able to provide enough emissions scrubbing to prevent a check engine light.
Low-end power and sound that you can enjoy every day! The perfect complement to either the factory exhaust system or Fabspeed’s performance exhaust systems, these high-flow headers are designed around HJS catalytic converters, making them the best upgrade for more enjoyable street driving and emissions compliance.
Designed with noticeable street performance in mind, these Sport Headers provide an additional 26 whp and 39 ft/lbs of torque at 3600 RPM. This translates to significantly better acceleration and throttle response when powering away from a stop light or merging onto your favorite highway. Thanks to the world-class performance of the HJS catalytic converter cores, your GT4 stays emissions-compliant in most regions and will not throw a Check Engine Light.
In addition to the performance gains, Fabspeed’s GT4 Sport Headers also add great character to the exhaust note by improving the overall volume and tone.
Additional Information:
| HP (whp) | TQ (ft/lbs) | WT (lbs) |
|---|---|---|
| +26 | +39 | -6 |
Features:
- Fits all Porsche 981 Cayman GT4 / Boxster Spyder vehicles (2015-2016)
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Includes German-imported 200-cell HJS Sport Catalytic Converters for maximum performance and reliability
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Adds 26 whp and 39 ft-lbs of torque at 3600RPM, providing significantly better performance during street acceleration
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Constructed from equal-length T304 stainless steel C.N.C. mandrel-bent tubing for improved torque and equalized engine pulsing
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Optimized for maximum performance with NO check engine light, guaranteed
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More power and torque across the RPM band and dramatically improved exhaust sound
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Direct replacement for the OEM headers with no cutting or welding required
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Includes multi-layer exhaust manifold gasket
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All Fabspeed performance products are backed by the Fabspeed Lifetime Warranty
Dynojet

Vehicle Fitment:
| MAKE | MODEL / SUB-Model | CHASSIS | YEAR |
| PORSCHE | Cayman GT4 | 981 | 2015-2016 |
NSTALLATION NOTE: To ensure proper header seal, after initial heat cycle, tighten all exhaust bolts to the OEM torque specs.
If items are on back order once the order has processed, buyers will receive an email regarding estimated time of arrival, 6-8 weeks is industry standard. Delivery time is subject to change. Valve Control Exhaust will not be held liable for any delays. All back order cancellations are subject to a 50% non-refundable deposit. Please be aware of this before ordering. If you have any questions, please contact us at info@valvecontrolexhaust.com






















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