The PPE 116111200 High-Flow Exhaust Manifolds with Up-Pipes for your 02-05
GM 6.6L Duramax LB7/LLY increase exhaust flow by 20 percent and are 50 state
emissions legal. Designed to outlast your truck the manifolds are made
from high-quality cast iron and the up pipes are made from stainless
steel. Plus the aircraft grade Up-Pipe bellows are high-flow, internally
sleeved, and have an increased inner diameter.