CAT 3406E/C15/C16 LOW MOUNT EXHAUST MANIFOLD

If you’re looking to improve airflow and reliability on your CAT 3406E, C15, or C16, the PDI Big Boss Low Mount Exhaust Manifold is designed to deliver better turbo response, cooler exhaust temperatures, and long-lasting durability.

The Low Mount Exhaust Manifold design helps maximize exhaust airflow while maintaining the proper positioning for low mount turbo setups. Each runner has been carefully engineered and tested to create balanced exhaust flow into the turbocharger, helping the turbo spool quicker while improving overall engine efficiency.

Compared to factory manifolds, the PDI Big Boss design increases airflow by an average of 20%, while lowering exhaust gas temperatures by 75–100°F. Improved airflow and optimized exhaust pressure-to-boost pressure ratios can help support stronger performance and potential fuel economy improvements.

PDI builds these manifolds using High Silicon with Molybdenum Ductile Iron (HSMD), a premium material designed to handle extreme heat cycles. This heavy-duty construction helps eliminate common failures such as warping, cracking, and center divider erosion that are often seen in stock manifolds after years of heat and vibration. The redesigned mounting surfaces also help prevent failures caused by manifold fatigue.

Product Name

CAT 3406E / C15 / C16 Low Mount Exhaust Manifold

Available For

1994–2004 Caterpillar Engines

• 3406E

• C15

• C16

Key Benefits

• 20% increase in airflow over stock manifolds

• 75–100°F cooler exhaust gas temperatures

• Helps reduce turbo lag and improve turbo response

• Designed for low mount turbo configurations

• Supports improved engine efficiency and potential fuel economy gains

• Made in the USA

Premium Construction

• Built from High Silicon Molybdenum Ductile Iron (HSMD)

• Designed to resist warping, cracking, and heat erosion

• Reinforced mounting surfaces for improved durability

Compliance

CAT Manifold CARB EO# D-773-2

Warranty

3 Year Unlimited Mileage Warranty

At Redneck Diesel Performance, we carry parts that help your truck run cooler, pull harder, and stay reliable mile after mile. And if you'd rather have it handled professionally, we can install the manifold for you at our shop as well.