Dieselr High Flow Exhaust Manifold w/o EGR Provision - Pair 255-04604 | 2017–2026 Duramax L5P

The Dieselr High Flow Exhaust Manifold L5P (Pair) is engineered for 2017–2024 Duramax 6.6L trucks that demand serious performance and reliability. Designed to replace weak, restrictive factory castings prone to cracking, warping, and leaking under heat and load, these manifolds provide a stronger, cleaner path for exhaust flow — no thin flanges, no warping, no EGR restriction.

Performance-Driven Design

• No EGR provision for a simplified, streamlined exhaust path
• Thicker flange and runner walls prevent cracking and burnout
• Optimized flow for faster turbo spool and lower EGTs
• Rust-resistant finish ensures long-term durability
• Direct bolt-on fitment for 2017–2024 6.6L Duramax trucks

This high-flow manifold improves exhaust scavenging and reduces backpressure, helping your turbo respond faster and run cooler under load. Whether towing, hauling, or tuning, you'll notice improved throttle response and longer component life.

Built to Last

• Includes new gaskets and heavy-duty mounting hardware for a leak-free install
• Precision flanges maintain a tight seal under boost
• Heat-resistant castings resist fatigue and thermal stress

When your Duramax works hard, cheap manifolds won’t cut it. The Dieselr High Flow Exhaust Manifold L5P delivers superior flow, perfect fit, and durability — because every psi of boost starts with solid hardware.