Dieselr Aluminized 4" Cat & DPF Race Pipes | GM 2500/3500 6.6L DURAMAX LML 2011-2015

The Dieselr Aluminized 4" Cat & DPF Race Pipes (2011–2015) are engineered for serious diesel applications demanding reliability, flow efficiency, and long-term strength. Constructed from heavy-gauge aluminized steel, these pipes deliver clean airflow, reduced restriction, and dependable corrosion protection.

Every Dieselr race pipe is mandrel-bent for consistent exhaust velocity and precision-welded for a leak-free finish. The aluminized surface shields against heat, salt, and oxidation, ensuring the system holds up in harsh conditions and high-load use.

Installation is straightforward with factory-style hanger alignment and secure clamping points, giving a tight, professional fit without rattles or stress points.

Key Features

• 4" aluminized steel for strength and corrosion resistance
• Mandrel-bent tubing for unrestricted exhaust flow
• Precision-welded seams for long-term reliability
• Engineered for efficient installation and clean fitment