PDI Big Boss Ceramic Coated EGR Exhaust Manifold for Detroit Series 60 DDEC 4/5 (2003–2006)

CARB EO# D-773-7 | OEM Ref#: 23533862, 23536449, 23533949 | Made in the USA

Compatibility

Engine Make: Detroit Diesel

Engine Model: Series 60 DDEC IV & V

Displacement: 12.7L & 14L

Model Years: 2003, 2004, 2005, 2006

OEM Cross Reference: 23533862, 23536449, 23533949

Performance Overview

Upgrade your emissions-era Detroit engine with the PDI Big Boss Ceramic Coated EGR Exhaust Manifold—engineered for the 2003–2006 Series 60 12.7L and 14L engines with EGR. This manifold delivers an average 20% airflow increase in key runner areas and reduces exhaust gas temperatures (EGTs) by 75–100°F.

Unlike restrictive factory manifolds or lower-quality aftermarket options, the PDI Big Boss features flow-optimized ports, gradual transitions, and precisely machined surfaces that improve turbocharger efficiency, reduce thermal stress, and enhance fuel economy.

Key Technical Benefits

Ceramic Coated for Heat Retention & Durability
Helps keep exhaust energy up to the turbo, reducing radiant heat loss and enhancing spool-up

+20% Airflow in Key Zones
Increases velocity while minimizing turbulence

Lower EGTs (75–100°F)
Improves engine reliability and reduces load on the cooling system

Reduces Turbo Lag
Balanced flow ports support quicker boost response

Stronger Build with HSMD Casting
No warping, cracking, or divider erosion—built to last

Material & Build Quality

Manufactured using High Silicon with Molybdenum Ductile Iron (HSMD), PDI’s exhaust manifolds resist the most common failure points:

Warping due to extreme heat cycling

Stress cracking around mounting flanges and center dividers

Flaking or surface breakdown over time

The ceramic coating adds another level of performance—keeping heat inside the runners for improved turbocharger efficiency while protecting surrounding engine components from heat soak.

Design Features

Flow-Tested Runner Design: Reduces swirl rates and flow friction

Improved Mounting Geometry: Prevents fatigue at flange surfaces

Precision Cast & Machined in the USA

Installation & Fit

Direct Replacement for OEM #s: 23533862, 23536449, 23533949

Compatible with EGR Systems

Includes: Mounting hardware and gaskets (if supplied by PDI)

Average Install Time: 3–4 hours by experienced technician

Warranty

2-Year / Unlimited Mile Warranty

CARB Certified (EO# D-773-7) – 50-state legal

Technical Support by PDI’s USA-Based Team

Why Buy from Heavy Duty Kits?

Heavy Duty Kits delivers performance-grade diesel parts trusted by engine builders, fleet operators, and owner-operators. With fast shipping, responsive support, and trusted brands like PDI, we help you eliminate downtime and improve performance mile after mile.