Bully Dog 2013-19 Paccar MX-13 Big Rig Ceramic Coated FTP Exhaust Manifold 85401 (88320)

The Bully Dog Big Rig Ceramic Coated FTP Exhaust Manifold (85401) is specifically designed for heavy-duty trucks equipped with the Paccar MX-13 12.9L engine. It serves as a direct performance replacement for the stock OEM manifold, which is prone to leaking or cracking.

Vehicle Compatibility

This exhaust manifold is primarily compatible with Kenworth and Peterbilt trucks. Detailed fitment includes:

• Engine: Paccar MX-13 12.9L (Common Rail)

• Model Years: 2013–2019 (specifically noted for 2013.5–2016 models in some instances)

• OEM Part Number Replacements: This unit replaces OEM numbers 9886, 9887, 1919886, 1919887, and 1879775.

Key Performance Benefits

• Efficiency: Offers an 18% increase in airflow over stock models, leading to a 0.2 to 0.3 MPG improvement.

• Power: Can provide an additional 30 horsepower to the rear wheels and reduces turbo lag.

• Heat Management: The ceramic coating keeps radiating temperatures 300°F cooler and lowers Exhaust Gas Temperatures (EGT) by 80-100°F.

• Durability: Features thicker flanges and a hand-ported, polished interior to prevent the common cracking and warping seen in factory manifolds.