DIESELR Exhaust Manifold Kit w/ Up-Pipes (2001-2016 Duramax 6.6L LB7/LLY/LBZ/LMM/LML)The DIESELR Exhaust Manifold Kit with Up Pipes for Duramax is built for 20012016 GM trucks running the 6. 6L LB7, LLY, LBZ, LMM, or LML. If youre done with restrictive factory manifolds and thin walled up pipes that fail under heat, this kit gives you what matters thicker steel, smoother flow, and hardware that holds under pressure. No hype. Just stronger parts that bolt in and perform. Each DIESELR Exhaust Manifold Kit with Up Pipes for Duramax