PDI Caterpillar C12 Exhaust Manifold – Ceramic Coated (1998–2004) | OEM 115-2989

Maximize your CAT C12 engine’s performance with the PDI Big Boss Ceramic Coated Exhaust Manifold, engineered for 1998–2004 Caterpillar C12 engines. Designed for durability, airflow, and heat control, this manifold delivers a 20% increase in airflow and reduces exhaust gas temperatures (EGTs) by 75–100°F, giving you more pulling power, better fuel economy, and longer engine life.

CARB EO# D773-2 Approved – Emissions-compliant performance upgrade.
Key Features & Benefits

20% Airflow Increase Over Stock – Optimized runner and port design to reduce turbo lag and improve power output.

Lower EGTs by 75–100°F – Protects engine components and improves reliability.

Made in the USA – Precision manufacturing for perfect fit and long service life.

HSMD High-Grade Material – Built from High Silicon Molybdenum Ductile Iron to resist warping, cracking, and heat erosion.

Balanced Flow Design – Each port is engineered to provide even airflow to the turbocharger.

CARB-Compliant Upgrade – Meets emissions standards while boosting performance.

Direct OEM Replacement – Fits OEM part number 115-2989 with no modifications required.

Technical Specifications

Application: Caterpillar C12 (1998–2004)

Finish: High-temperature ceramic coating

OEM Reference: 115-2989

Material: High Silicon with Molybdenum Ductile Iron (HSMD)

Warranty: 2-Year Unlimited Mile Warranty

CARB EO#: D773-2

Why Upgrade to the PDI Big Boss C12 Exhaust Manifold?

The factory manifold can suffer from warping, cracking, and center divider erosion, leading to performance loss and costly repairs. The PDI Big Boss manifold solves these problems with:

Stronger, heat-resistant HSMD material

Improved airflow for faster turbo spool and more torque

Better exhaust pressure-to-boost pressure ratios for improved fuel efficiency

Long-term durability under extreme heat and load

FAQ – PDI Caterpillar C12 Ceramic Coated Exhaust Manifold

Q: Is this manifold CARB approved?
A: Yes, it has CARB EO# D773-2 and is emissions compliant.

Q: What’s the benefit of HSMD material?
A: High Silicon Molybdenum Ductile Iron resists warping, cracking, and heat erosion far better than standard cast iron.

Q: How does this manifold improve performance?
A: The optimized design reduces turbo lag, increases airflow by 20%, and lowers EGTs by up to 100°F.

Q: Will this fit without modifications?
A: Yes, it’s a direct OEM replacement for 115-2989.
Order Yours Today

Boost your CAT C12’s performance, durability, and efficiency with the PDI Big Boss Ceramic Coated Exhaust Manifold — a proven upgrade for owner-operators and fleets.