PDI Big Boss ISX/X15 Exhaust Manifold – Ceramic Coated (2010–2024) | OEM 3687063, 3692604, 3689251, 3687062

Unlock the full performance potential of your Cummins ISX15 or X15 with the PDI Big Boss Ceramic Coated Exhaust Manifold, engineered for 2010–2024 models. This high-flow manifold delivers up to 20% more airflow than stock, helping reduce exhaust gas temperatures (EGTs) by 75–100°F while improving turbo response, pulling power, and overall engine efficiency.

Key Features & Benefits

Up to 20% More Airflow Over Stock – Optimized for maximum exhaust efficiency and horsepower gains.

Lower EGTs by 75–100°F – Keeps your turbo and engine running cooler under heavy loads.

Ceramic Coated for Heat Management – Retains exhaust heat for improved gas velocity and reduced engine bay temperatures.

Made in the USA – Precision manufacturing for a perfect fit and long-lasting durability.

Direct OEM Replacement – Fits OEM part numbers 3687063, 3692604, 3689251, 3687062 without modifications.

Technical Specifications

Application: Cummins ISX15 & X15 (2010–2024)

Finish: High-temperature ceramic coating

OEM Reference: 3687063, 3692604, 3689251, 3687062

Warranty: 2-Year Unlimited Mile Warranty

Why Upgrade to the PDI Big Boss ISX/X15 Manifold?

The factory Cummins ISX/X15 manifold can suffer from cracking, heat fatigue, and restrictive flow. The PDI Big Boss solves these issues with:

High-flow ports for better throttle response and turbo spool

Cooler operating temps for longer turbocharger life

Balanced exhaust flow for improved fuel efficiency

Stronger, heat-resistant construction to prevent warping and cracking

FAQ – PDI ISX15 / X15 Ceramic Coated Exhaust Manifold

Q: Will this manifold fit my ISX15 or X15?
A: Yes, it’s designed for 2010–2024 Cummins ISX15 and X15 engines and matches OEM numbers 3687063, 3692604, 3689251, 3687062.

Q: What’s the benefit of ceramic coating?
A: Ceramic coating helps retain heat for faster turbo response, reduces under-hood temps, and protects the manifold from corrosion.

Q: How much more airflow will I get?
A: On average, up to 20% more airflow compared to the stock manifold.

Q: Is installation a direct bolt-on?
A: Yes, no modifications are required — it’s a direct OEM replacement.
Order Yours Today

Upgrade your Cummins ISX15 or X15 with the PDI Big Boss Ceramic Coated Exhaust Manifold and experience cooler temps, more power, and longer-lasting durability.