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The passages are bigger than the standard manifolds with revised passage route to give more flow potential and lower EGTs
our remanufactured cylinder heads are engineered to exceed your expectations
In addition
Keep in mind if you are looking for a big power bump then that comes from the Low Pressure turbo
2011-2016 Duramax LML Mahle Set of 8 Pistons w/ Rings - 0.25MM (224-3935WR-0.25MM) Gen III LS The passages are bigger than2011 2016 Duramax LML Mahle Set of 8 Pistons w Rings 0. 25MM (224 3935WR 0. 25MM) The MAHLE 224 3935WR 0. 25MM Piston With Rings are a high quality replacement for the worn out or damaged piston and rings in your 2011 2016 GM 6. 6L Duramax LML LGH. All of MAHLE Original Pistons are manufactured to exacting specifications with coated skirts to minimize friction & scuffing and feature a factory quality construction with the same excellent factory piston