Mercedes Benz AMG W205 C63 C63S M177 Catless Exhaust Downpipe 2015-2023 4.0TT V8

Upgrade your Mercedes-Benz AMG W205 C63 or C63S equipped with the M177 4.0TT V8 engine with the KYOSTAR Catless Downpipe Set. Designed as a performance-oriented replacement for the factory downpipe sections, this system provides a freer-flowing exhaust path for the twin-turbocharged M177 engine while delivering a more aggressive exhaust character.

The catless configuration removes the catalytic restriction within the factory downpipe section to help reduce exhaust backpressure and improve exhaust gas flow from the turbochargers. The multi-piece dual-downpipe design follows the vehicle-specific exhaust layout and provides a performance-focused upgrade for compatible W205 C63 and C63S applications.

• Performance catless downpipe set designed for Mercedes-Benz AMG W205 C63 and C63S models equipped with the M177 4.0TT V8 engine.

• Catless configuration removes catalytic restriction within the factory downpipe section for a freer-flowing exhaust path.

• Designed to help reduce exhaust restriction immediately downstream of the twin turbochargers.

• Multi-piece dual-downpipe configuration matches the twin-turbo exhaust layout of compatible M177 applications.

• Provides a louder, deeper, and more aggressive performance exhaust character compared with the factory downpipe configuration.

• Designed with vehicle-specific bends, connection points, and mounting provisions for compatible W205 applications.

• Suitable for performance-oriented and modified M177 builds where local regulations permit.

• 2015-2023 Mercedes-Benz AMG W205 C63 M177 4.0TT V8

• 2015-2023 Mercedes-Benz AMG W205 C63S M177 4.0TT V8

• This product uses a catless configuration and does not contain catalytic converters.

• Designed for selected Mercedes-Benz AMG W205 C63 and C63S models equipped with the M177 4.0TT V8 engine.

• Please verify your vehicle year, chassis code, engine code, factory downpipe configuration, turbocharger connections, sensor locations, and downstream exhaust connections before purchase.

• Installation of catless downpipes may trigger emissions-related diagnostic codes or a check engine light depending on the vehicle calibration and emissions monitoring system.

• This product may not comply with emissions regulations for public-road use in some regions. Please check applicable local regulations before purchase and installation.

Mercedes-Benz AMG W205 C63 and C63S exhaust configurations may vary depending on production year, regional specification, factory emissions equipment, and previous vehicle modifications. Please compare the original downpipe routing, turbocharger outlet connections, sensor locations, mounting points, and downstream exhaust connections with the product photos before installation.

Vehicles equipped with upgraded turbochargers, aftermarket midpipes, cat-back exhaust systems, or other modified exhaust components may require additional fitment verification or installation adjustment.

Professional installation is recommended. Proper turbocharger connection alignment, exhaust pipe positioning, sensor installation, mounting point alignment, exhaust clearance, and leak testing should be performed to ensure correct fitment and reliable operation.

Q: Will these downpipes fit my Mercedes-AMG W205 C63?
A: Yes. The supplied fitment information lists 2015-2023 Mercedes-Benz AMG W205 C63 models equipped with the M177 4.0TT V8 engine.

Q: Will these downpipes fit the W205 C63S?
A: Yes. The supplied fitment information also includes 2015-2023 Mercedes-Benz AMG W205 C63S applications equipped with the M177 4.0TT V8.

Q: Are these downpipes catless?
A: Yes. This product is listed as a catless downpipe set and does not contain catalytic converters.

Q: Is this a complete left and right downpipe set?
A: The supplied product image shows a multi-piece left and right downpipe configuration designed for the M177 twin-turbo exhaust system.

Q: Will the exhaust become louder after installation?
A: Yes. Removing the catalytic restriction generally produces a louder and more aggressive exhaust character and can make turbocharger sound more noticeable.

Q: Can a check engine light appear after installing catless downpipes?
A: Yes. A catless exhaust configuration may trigger emissions-related diagnostic codes or a check engine light depending on the vehicle calibration and emissions monitoring system.

Q: Can these downpipes be used with an aftermarket cat-back or midpipe?
A: Compatibility depends on the dimensions and connection layout of the aftermarket exhaust components. Please verify all connection points before installation.

Q: Is ECU tuning required?
A: ECU tuning requirements are not specified in the supplied product information. Requirements may vary depending on vehicle calibration, emissions monitoring, and other performance modifications.

Q: Is professional installation recommended?
A: Yes. Professional installation is recommended to ensure correct turbocharger connections, pipe alignment, sensor positioning, secure exhaust connections, and leak-free operation.

Every KYOSTAR exhaust component is inspected before shipment to ensure product condition, pipe construction, connection points, mounting provisions, included components, and packaging integrity before delivery.

All components are securely packaged to help reduce the risk of transportation damage. Please inspect the package and all downpipe components after delivery and contact our support team if you notice missing components, shipping damage, or product-related concerns.

Please contact KYOSTAR customer support if you need assistance with vehicle fitment, installation questions, missing components, or after-sales service.