Grail Exhaust - Porsche 718 Cayman GT4/GTS (ECE Approved)

QT Parts is a Finnish online store.

Our warehouse is located in Nokia, Finland.

You can collect your order directly from us if needed. Simply select “Pickup” at checkout.

Pay securely with multiple payment methods, including invoice and installment plans through Klarna.

The delivery time for products in stock is 1-5 business days. We ship worldwide.

If the product is not in stock and it is a pre order product, the average delivery time is 5-21 business days. If the product has a longer delivery time than previously announced, we will be in touch. International orders may be subject to VAT, import duties, and customs fees upon arrival in the destination country.

Terms for product returns:

• You must return the ordered products within 14 days of receiving
• The products must be unused and without damages
• Commission fee for handling returns is 21,90€
• For product returns, the customer is in charge of the return costs. Only door to door service (Express)
• Shipping costs are not refunded

For international orders sales are final and non-refundable. Once an order is placed, it cannot be canceled or returned. By placing an order, you acknowledge and agree to these terms.

Return address: QT Parts, Vasarakatu 8B, 37150 Nokia, Finland.

Pre order / made-to-order products

If the product you have ordered is a pre order or made-to-order item, it is not subject to the 14-day right of withdrawal or return under consumer protection laws, as the product is manufactured or sourced specifically based on the customer’s individual order.

If you wish to cancel your order before receiving the product, we will refund 50% of the total order amount.

This condition applies to the following product categories:

• Suspension
• Engine Tuning
• Engine Parts
• Exhaust Systems
• Fueling
• Turbochargers/superchargers
• Drivetrain
• ECE-approved Downpipes

All of the above products are manufactured or sourced individually based on the customer’s order, and therefore cannot be returned after delivery, unless the product has a manufacturing or material defect.

In the event of such a defect, the standard liability for defects as provided by consumer protection legislation shall apply.

Porsche 718 Cayman GT4 / GTS – GRAIL Exhaust - Valved Exhaust System

Product Description

The Porsche 718 Cayman GT4 and GTS are based on a naturally aspirated 4.0-liter flat-six engine, known for its high rev-responsiveness and direct throttle response. The mid-engine design ensures excellent balance and precise handling.

The GRAIL valved exhaust system builds upon this foundation, sharpening the sound profile – powerfully tuned, clear, and without intrusive resonance (drone).

Available versions

Highlights

• 4.0-liter high-revving boxer engine – GRAIL produces a distinctly sporty sound profile without drone

• Centrally mounted outlets and mid-engine design – emphasizes sound clarity under load and at high RPMs

• ECE type-approved – registration-free* in all countries recognizing ECE approval

• Manufactured from high-quality L304 stainless steel

• CNC-machined precision parts – maximum durability and finish

• Flow-optimized piping – optimal exhaust gas flow and thermal stability

• Developed in Germany – state-of-the-art design and manufacturing precision

Technical refinement – perfectly integrated

The exhaust flap system is custom-designed for each vehicle and meets all legal requirements. The overall package is optimized to provide the best possible combination of sound, performance, and usability.

If you have any questions about configuration or compatibility, our team of experts will be happy to assist you before your purchase.

Designed for the driver who wants more from their Porsche 718 Cayman GT4/GTS – a clean and sporty engine sound that supports precise driving.

*Applies to EU-registered vehicles. For imported cars, we recommend confirming compatibility in advance.