Unleash the signature AMG V8 character in your 2013-2018 Mercedes AMG G63 W463 M157 5.5 biturbo engine with Redstar performance exhaust downpipes. Engineered as a direct replacement for the factory downpipes, this system elevates exhaust flow while preserving OE integration and everyday drivability. A proven way to bring out that distinctive burble and crackle from the biturbo G-wagen.

By reducing backpressure, the Redstar downpipes promote faster turbo spool and a crisper throttle response, delivering a clear step-up in performance with a richer, more assertive exhaust note. Optional thermal shielding cuts radiant heat by up to 80% to lower under-bonnet temperatures, supporting reliability and helping protect nearby hoses, wiring, and components. The optimised flow also eases strain on the turbochargers, aiding their service life.

Built from 2.0mm wall 304 stainless steel, every assembly is 100% TIG welded and back purged, with OEM-spec flanges and full bracketry for a 100% bolt-on install. Redstar quality ensures a secure, rattle-free fit that integrates cleanly with the G63 exhaust. Choose catted or competition options to tailor sound and response to your goals.

Available Options

• HJS HD 200cpsi Catalytic Converters: Engineered in Germany and trusted worldwide, the HJS 200cpsi ultra high-performance cats are rated for over 1000hp. Renowned for exceptional flow, durability, and consistent quality, these converters set the benchmark for high-output applications. Ideal for drivers demanding maximum performance without compromise.
• GESI GEN2 400cpsi Catalytic Converters: The latest GEN2 series from GESI is rated to support up to 1000hp while offering smoother exhaust flow and improved efficiency compared with factory units. Featuring advanced emissions technology for optimal catalyst function at high flow rates. A strong choice for those seeking significant performance gains with refined operation.
• OEM-Style Heat Shielding: Redstar's signature thermal management system reduces radiant exhaust heat by up to 80%. Developed with motorsport-inspired materials and construction, it uses a multi-layer design of ceramic insulation and embossed stainless steel foil. Unlike wraps or coatings that degrade quickly, Redstar shielding delivers long-term durability and consistent protection for engine bay components.
• Competition/Catless: Maximum flow design for uncompromised performance. Delivers the most aggressive exhaust note and optimal power gains. Track use only - not for road use.

Key Performance Benefits

• Significant power gain
• Faster turbo spool and sharper throttle response
• Helps extend turbocharger longevity
• Reduces under-bonnet temperatures for improved consistency
• Deeper, more characterful V8 exhaust note with burbles and crackles
• 100% bolt-on installation for straightforward fitment

Technical Specifications

• Constructed from 2.0mm wall 304 stainless steel
• 100% TIG welded and back purged
• OEM-spec flanges for precise alignment
• All brackets and mounts mirror the OEM unit

Fitments

• 2013-2018 Mercedes AMG G63 W463 M157 5.5 biturbo engine