M177 Downpipes [GESI GEN2 400cpsi]

Unleash the voice and response of your Mercedes-AMG with Redstar performance exhaust downpipes engineered for the M177 4.0 twin-turbo V8. Precisely matched to 2016-2023 E63 / E63S 4Matic W213 S213 C238 A238, 2019+ GT63 / GT63S 4Matic 4-door x290, and 2024+ GT63 S E Performance 4-door x290 hybrid, these Redstar downpipes replace the restrictive factory units while retaining full bolt-on compatibility. Choose Competition Race Use Only, GESI GEN2 400cpsi or HJS HD 200cpsi configurations, with the option of integrated OEM-style heat shielding. Lower backpressure translates to noticeably faster turbo spool and sharper throttle response, with significant power gains and a deeper, more engaging AMG V8 soundtrack including burbles and crackles on the E63 W213. Built for durability and precision fit, every Redstar downpipe uses highest quality 2.0mm wall 304 stainless steel, is 100% TIG welded and back purged, and features OEM-spec flanges with factory-style brackets and mounts. Note that the Competition/Catless configuration is for track use only and not for road use. Key Performance Benefits include significant power gains across the rev range, faster turbo spool, sharper throttle response, reduced under-bonnet temperatures, and a richer, more engaging AMG exhaust note. Technical Specifications include highest quality 2.0mm wall 304 stainless steel construction, 100% TIG welded and back purged, OEM-spec flanges, factory-style brackets and mounts, proper thermocouple bungs, and LHD/RHD compliance.