Description
PDI Big Boss Exhaust Manifold for Caterpillar 3406E, C15, C16 (1994–2004)
CARB EO# D-773-2 | Made in the USA | 2-Year Unlimited Mile Warranty
Compatible With:
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Engine Models: Caterpillar 3406E, C15, C16
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Year Range: 1994–2004
- OE Replacements 146-9445, 1469445
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Supported Serial Prefixes: 5EK, 6TS, 1LW, 1MM, 6NZ, 7CZ, MBN
Upgrade your CAT engine’s performance with the PDI Big Boss Exhaust Manifold, engineered to optimize airflow, improve turbo efficiency, and reduce exhaust gas temperatures (EGTs). This manifold delivers a 20% increase in airflow over OEM stock manifolds and reduces EGTs by up to 75–100°F, enhancing fuel economy and reducing turbo lag.
Built using High Silicon Molybdenum Ductile Iron (HSMD), this manifold is designed to endure the harshest heat cycles and vibration levels without warping, cracking, or center divider failure—common problems with factory manifolds.
Key Performance Benefits
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20% More Airflow than stock manifolds
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EGT Drop of 75–100°F, extending turbo and engine life
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Balanced Port Flow reduces turbo lag and improves spool time
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Optimized Backpressure-to-Boost Ratio, aiding in improved fuel economy
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Precision-machined Mounting Surfaces to prevent fatigue or cracking
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CARB Compliant (EO# D-773-2) – Legal in all 50 U.S. states
Material & Construction
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Material: High Silicon with Molybdenum Ductile Iron (HSMD)
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Casting Design: Thicker flanges and walls for durability
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Mounting: Redesigned surfaces to eliminate gasket blowout and stud fatigue
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Manufactured: 100% in the United States
Available Finishes & Coatings
| Finish Type | Appearance | Heat Protection | Rust Resistance | Best For |
|---|---|---|---|---|
| Regular Cast | Raw Ductile Iron Grey | Standard | Moderate | Budget-friendly performance users |
| Chrome Polished | Mirror-like finish | High | Excellent | Show trucks & corrosion prevention |
| Black Coated | Satin/Matte Black | Very High | Superior | Heat-dissipation and stealth look |
Why Upgrade with PDI Big Boss?
Unlike OEM exhaust manifolds prone to cracking and heat fatigue, PDI’s Big Boss Manifolds are designed for long-haul durability and performance. Whether you’re chasing fuel savings, need to reduce EGTs, or want faster turbo spool-up, this is a bolt-on upgrade that delivers real, measurable results.
Backed by Warranty
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2-Year Unlimited Mile Warranty
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Customer-first support from PDI’s technical team
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Proven performance on high-mileage fleet applications
Installation
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Direct Fitment: No modifications required
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Includes: Mounting hardware and gaskets (if applicable)
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Installation Time: Approximately 3–4 hours by a skilled technician
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