Big Boss ceramic-coated exhaust manifold for 1998–2004 CAT C12. Up to 20% more airflow, 75–100°F cooler EGTs. HSMD high-silicon molybdenum ductile-iron construction resists warping, cracking, and heat erosion; balanced port flow.
Made in the USA. 2-year unlimited-mile warranty.
Genuine PDI part supplied and installed by TDC Truck and Diesel.
