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(1) Aluminum Intercooler Pipe
Unique One-Piece Housing
The factory cover uses a gasket and over time the plate can warp
w/3 Position Selector Switch
Designed to minize restriction and increase airflow
DORMAN 674-731 LEFT SIDE EXHAUST MANIFOLD BATTERY/STARTING/CHARGING (1) Aluminum Intercooler PipeThe Dorman 674 731 Left Side Exhaust Manifold is a direct replacement for your 2001 2016 GM 6. 6L Duramax. This manifold features a "full bore" design that isn't kinked like the factory manifold on the 2001 2010 models. This makes it a popular upgrade for the earlier trucks as the increased flow will "balance" out the engine helping with throttle response and better overall performance. FEATURES: Direct Fit Upgrade On 2001 2010 Duramax Trucks Replaces
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