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.

PLEASE NOTE! Pre-order product! Deliveries start from January 2027!

GRAIL Downpipes – Mercedes-AMG C63 (W205/S205/A205/C205, M177, EURO 6, without OPF)

• No registration required* when combined with a GRAIL exhaust system thanks to ECE type approval
• L304 stainless steel – maximum sound profile for the M177 V8 biturbo, compatible with stock or GRAIL exhaust systems
• Compatibility: W205 / S205 / A205 / C205 (EURO 6, without OPF) – original OEM exhaust tips cannot be retained
• Deliveries starting from January 2027

GRAIL Downpipes are designed for Mercedes-AMG C63 models (W205 / S205 / A205 / C205, M177, EURO 6, without OPF). They replace the factory catalytic converters and unleash the full sound potential of the 4.0-liter V8 biturbo engine.

The downpipes are manufactured from high-quality L304 stainless steel, and their design is optimized to bring out the engine's natural exhaust note as freely as possible. The product can be paired with either the original OEM exhaust system or a GRAIL exhaust system.

When combined with a GRAIL exhaust system, the setup is exempt from additional vehicle registration* thanks to ECE type approval. Please note that original OEM exhaust tips cannot be used with this product.

Deliveries starting from January 2027.

Product features

Unleash the V8 sound

GRAIL Downpipes remove the original catalytic converters of the Mercedes-AMG C63 M177 engine, revealing the raw and unfiltered character of the 4.0-liter V8 biturbo throughout the entire rev range.

L304 stainless steel

Each GRAIL Downpipe is precision-manufactured from L304 stainless steel. The material provides excellent durability and corrosion resistance, ensuring long-term reliability under the extremely high temperatures of the M177 engine.

Versatile compatibility

GRAIL Downpipes fit W205 / S205 / A205 / C205 models (EURO 6, without OPF). They can be used with either the original OEM exhaust system or in combination with a GRAIL exhaust system. When paired with a GRAIL exhaust system, the setup is exempt from additional registration* thanks to ECE type approval.

EURO 6, without OPF

This product is specifically designed for Mercedes-AMG C63 EURO 6 versions without an OPF filter (2015–2018), ensuring precise fitment and proper system compatibility without the need for modifications.

ECE type approval

No registration required* in all countries covered by the ECE type approval.

German engineering

A system developed by German engineers, focusing on high quality and precision manufacturing.

L304 stainless steel

A corrosion-resistant and dimensionally accurate material that also offers a refined, high-quality finish.

Optimized flow

Efficient exhaust flow and optimized heat dissipation improve the performance of the system.

Distortion-free sound

Absorption technology reduces and eliminates distracting resonance and interfering frequencies transmitted into the cabin.

OEM-style installation

Designed for installation onto the vehicle's original mounting and suspension points.

This exhaust system carries ECE type approval, making it *exempt from vehicle registration and approved for road use in applicable countries and in accordance with the terms of the approval.