Description

PDI Big Boss Intake Manifold for Cummins ISX CM2250 (2010–2013)

Part Numbers: 3688948, 3686747
Fits: Cummins ISX15 CM2250 Engines (2010–2013)
Warranty: 1-Year Unlimited Mileage Warranty

Increase Airflow & Power with the Big Boss Intake Manifold

If you’re looking to boost performance on your 2010–2013 Cummins ISX15 engine, the PDI Big Boss Intake Manifold is the proven upgrade you need. Built to increase and balance airflow, this manifold unlocks up to 35% more air intake than the stock factory design—resulting in improved combustion, lower intake air temperatures, and power gains of up to 20 horsepower.

Like all PDI components, the Big Boss intake manifold is engineered with both performance and efficiency in mind. Whether you’re after more pulling power or better fuel economy, this manifold helps you save money and make your drive more enjoyable.

Key Features & Benefits

• Up to 35% increased airflow through optimized open-port design
• 15–20 HP power gain on average
• Lower intake air temperatures for denser combustion
• Direct bolt-on fit – uses factory hardware and position
• Improved throttle response, fuel economy, and torque
• Made in the USA with premium materials

Emissions Compliance Notice

NOT LEGAL FOR SALE OR USE IN CALIFORNIA or states that follow CARB emissions regulations.

OEM Cross Reference

This manifold is a direct-fit replacement for OEM Cummins part numbers: 3688948, 3686747

Installation Overview

Installation is simple and quick—this manifold mounts directly into the OEM location using existing hardware. No special modifications or tuning is required.

Frequently Asked Questions (FAQs)

What performance benefits can I expect from this intake?

You’ll gain 15–20 horsepower, lower intake temps, and improved fuel economy thanks to better combustion and airflow balance.

Is this product emissions compliant?

No. It is not legal for sale or use in California or any CARB-regulated jurisdiction.

Will it fit my 2012 ISX15 engine?

Yes, this manifold fits all Cummins ISX15 engines using the CM2250 platform from 2010 to 2013.

Is installation DIY-friendly?

Absolutely. It’s a direct bolt-on upgrade and uses your existing factory mounting hardware. No special fabrication or tuning is needed.

Where is the PDI Big Boss Intake manufactured?

This product is Made in the USA and built to last under the most demanding diesel workloads.