While the search to increase Duramax LLY/LBZ/LMM power usually leads to exhaust, intake, or tuner, one part that’s often overlooked is the stock turbo downpipe. MBRP’s downpipes replace this restrictive factory exhaust component with a direct-replacement that mounts between the factory turbo and the rest of the exhaust. These downpipes delivers more flow, fuel economy, and better performance output.
Mandrel-Bent 16-Gauge Tubing with High-Temp Black Ceramic Coating.
20% Greater Exhaust Flow Over Stock.
Lower Exhaust Gas Temperature.
Quicker Throttle Response.
Greater Heat Retention.
Richer Diesel Sound.