2017-2020 GM 6.6L Duramax Standard Port Stainless Steel Exhaust Manifold Gasket Set 3 pcs PPE Diesel Transmission Intermediate Shaft|Transmission|Drivetrain & Differentials use >PPEs Extended Length Down

use >PPEs Extended Length Down Pipe in conjunction with >PPEs T4 Riser Block (with or without wastegate) for GT42R or larger turbos

High horsepower levels and heavy-duty use stress transmission parts past what they were originally designed to handle

5 Inch ID x 5 Inch Long Performance Silicone Reducer - Straight (515302505)

2006-2010 LBZ/LLM GM 6

Stock engine mounts fail over time as bushings deteriorate

2017-2020 GM 6.6L Duramax Standard Port Stainless Steel Exhaust Manifold Gasket Set 3 pcs PPE Diesel Transmission Intermediate Shaft|Transmission|Drivetrain & Differentials use >PPEs Extended Length DownMulti layered 301 stainless steel gaskets create a tight seal between the exhaust manifolds and GM 6. 6L Duramax engine. Molybdenum dry coating adds wear resistance and endures extreme heat cycles. PPE Manifold Gaskets are designed to fit both PPE High Flow Exhaust Manifolds and GM OEM manifolds.