Ram Cummins 6.7L Cab & Chassis 4" SCR Urea Race Pipe Over 70" (2011-2012)
Type: Race Pipes | Fits: Ram Cummins

Boost airflow and power with this precision-fit SCR delete pipe for long-wheelbase Cab & Chassis models.
The 4" SCR Urea Race Pipe is engineered for 2011–2012 Ram Cummins 6.7L Cab & Chassis trucks with a cab-to-axle length greater than 70". By removing the SCR and DEF/Urea systems, this pipe reduces backpressure and improves exhaust flow, resulting in more power, efficiency, and smoother operation under heavy-duty or off-road use.
Vehicle Fitment
-
2011 Ram Cummins 6.7L Cab & Chassis (over 70" cab-to-axle)
-
2012 Ram Cummins 6.7L Cab & Chassis (over 70" cab-to-axle)
- Not compatible with pickups
- Not compatible with under 70" setups (use PART #21124)
Specifications
Feature | Details |
---|---|
Pipe Diameter | 4 inches |
Material | High-quality aluminized steel |
Fitment | Designed for Cab & Chassis with cab-to-axle over 70" |
Exhaust Flow | Increased flow, reduced backpressure |
Compatibility | For SCR and DEF/Urea system removal |
Key Features
- Removes SCR and DEF/Urea systems to improve exhaust flow
- Reduces backpressure, boosting power and efficiency
- Built for long-wheelbase Cab & Chassis trucks (over 70" cab-to-axle)
- Heavy-duty 4" design for durability and performance
- Designed for off-road and competition applications
Benefits
- Smoother, more efficient operation
- Increased engine output and throttle response
- Improved airflow for long-term performance reliability
- Perfect fit for long cab-to-axle configurations
Important Notes:
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Important Notices
- Off‑Road Use Only
Products sold by JS Speed are intended for off‑road use and may be illegal on public roads where emissions or pollution‑control laws apply. - Check Local Laws
Before purchasing or installing, verify all applicable local, state/provincial, and federal regulations to ensure the modification is legal in your area. - Professional Installation Recommended
These parts should be installed by qualified professional mechanics. Improper installation can cause performance issues or vehicle damage. Unless a product page explicitly states otherwise, installation instructions are not included. Components are designed for users with solid mechanical knowledge, and minor adjustments or modifications may be required for proper fitment. Returns or refunds cannot be accepted due to difficulty completing an installation or the absence of instructions. - Warranty Impact
Use of these parts may void your vehicle’s factory warranty. Confirm with your vehicle manufacturer before purchase and installation. - Limitation of Liability
JS Speed is not responsible for damage, failures, or issues arising from the use or installation of these products. - Product Images
Images are for illustration only and may differ from the actual product due to manufacturer updates or improvements. - No Performance Guarantees
While these products are designed to enhance performance, JS Speed does not guarantee specific performance results.

