COMP Cams Thumpr NSR Camshaft

2003–2025 Dodge Ram, Durango, Charger, Magnum, Challenger, Chrysler 300, Jeep Grand Cherokee & Commander 5.7L, 6.1L & 6.4L HEMI

Part #: 112-700-11

Overview

The COMP Cams Thumpr NSR camshaft is a performance upgrade designed specifically for Dodge GEN III and GEN IV HEMI engines, covering a broad range of models from 2003 through 2025. This camshaft delivers the iconic Thumpr idle lope, providing an aggressive, race-inspired exhaust note while maintaining strong low-end torque and street-friendly drivability. It is ideal for enthusiasts seeking enhanced throttle response and mid-range power gains without sacrificing everyday usability.

Compatible with popular vehicles such as the Dodge Ram 1500/2500/3500, Durango, Charger, Challenger, Magnum, Chrysler 300, Jeep Grand Cherokee, and Commander, the Thumpr NSR camshaft offers a straightforward bolt-in upgrade that requires no valve spring changes, making it a practical choice for performance-minded drivers.

Key Features

The COMP Cams Thumpr NSR camshaft combines advanced engineering with user-friendly installation and reliable performance. Key features include:

• Optimized intake and exhaust lobes for improved mid-to-high RPM power delivery
• Signature Thumpr idle lope producing a deep, aggressive, racecar-style sound
• No valve spring upgrade required, simplifying installation and reducing cost
• Compatible with 5.7L, 6.1L, and 6.4L Dodge HEMI engines on GEN III and GEN IV platforms
• Recommended ECU tuning and Displacement on Demand (DOD) deletion for optimal performance
• Phaser limiter advised for VVT-equipped GEN IV HEMI engines to protect timing components
• Maintains strong low RPM torque for street-driven vehicles
• Delivers excellent throttle response and mid-range horsepower gains

Construction & Design

Manufactured with precision-ground lobes and premium materials, the Thumpr NSR camshaft is engineered to withstand the demands of performance driving. COMP Cams employs advanced cam profile technology tailored to the modern HEMI architecture, ensuring durability and consistent power delivery. The camshaft’s design strikes a balance between aggressive sound and reliable performance, making it suitable for daily drivers and weekend warriors alike.

Its direct bolt-in design eliminates the need for additional valvetrain upgrades, allowing for a hassle-free installation that preserves factory reliability while enhancing engine character.

Performance & Sound

The Thumpr NSR camshaft is renowned for its distinctive Thumpr idle—a deep, lopey exhaust note reminiscent of racecar engines. This aggressive sound is achieved without compromising drivability or low-end torque, a common issue with many performance cams. Drivers will experience improved throttle response and noticeable power gains in the mid to upper RPM range, making it perfect for spirited street driving and performance applications.

While there is a minor power trade-off below 2500 RPM, the overall performance improvements and enhanced auditory experience make this camshaft a favorite among HEMI enthusiasts seeking both sound and power.

Installation & Fitment

The COMP Cams Thumpr NSR camshaft is designed for direct installation on a wide range of Dodge and Jeep vehicles equipped with 5.7L, 6.1L, and 6.4L HEMI engines from 2003 to 2025. Installation does not require valve spring upgrades, reducing complexity and cost. However, COMP Cams recommends an ECU tune and DOD deletion to maximize engine performance and ensure proper operation.

For GEN IV HEMI engines equipped with variable valve timing (VVT), installing a phaser limiter is advised to protect the timing system and maintain long-term reliability. Professional installation is recommended to ensure correct timing and setup.

What's Included

• COMP Cams Thumpr NSR camshaft (Part #112-700-11)
• Installation instructions

Ideal For

This camshaft is perfect for Dodge and Jeep enthusiasts who want to enhance their vehicle’s performance and sound without extensive modifications. It suits street-driven vehicles where maintaining low-end torque and drivability is important, while also delivering a distinctive race-inspired idle and improved mid-range power. Ideal applications include Dodge Ram trucks, Chargers, Challengers, Durangos, Magnums, Chrysler 300s, Jeep Grand Cherokees, and Commanders equipped with compatible HEMI engines.

COMP Cams is a leading performance valvetrain manufacturer, known for camshafts and supporting components built for everything from mild street upgrades to full race engines. Their product range covers camshafts, lifters, valve springs, rocker arms, and timing/valvetrain parts—key pieces for dialing in powerband, drivability, and RPM capability.