The Stainless Steel High Flow Exhaust Manifold for CAT C15, C16, and 3406E engines replaces OEM part number 146-9445 and is designed for commercial diesel trucks, heavy-duty equipment, and high-mileage engine applications. Built from stainless steel for excellent durability and heat resistance, this high flow exhaust manifold provides 20% increase in airflow over stock to help improve exhaust flow, reduce restriction, and support turbo efficiency.

Fitment

• 1994–2004 Caterpillar 3406E — 14.6L displacement
• 1999–2004 Caterpillar C15 — 14.6L displacement
• 1999–2002 Caterpillar C16 — 15.8L displacement

Product Details

• Material: Stainless steel construction for rust and heat resistance
• Configuration: Single turbo, T6 turbocharger flange
• Airflow Improvement: 20% increase in airflow over stock
• EGT Reduction: 75–100 degree cooling of exhaust gas temperatures
• Weight: 39 lbs
• Package Dimensions: 44″ W × 10″ H × 8″ L
• Turbo Mount: Ball and socket slip joints for excellent sealing
• Assembly: Three-piece design with dual end sections and center section
• Warranty: One-year coverage

Installation

Direct fit for OEM mounting locations on single-turbo Peterbilt and Kenworth trucks equipped with CAT 3406E, C15, and C16 engines. Tighten manifold bolts in a crisscross pattern to Caterpillar-specified torque, checking all hardware after initial heat cycles. Professional installation is recommended to ensure proper sealing and gasket compression.

Check local emissions regulations before purchase. Professional installation is recommended.

Get the right part the first time.