MOPAR 4007851 Nos Connection Intake Rocker Arm 426

( Manufacturer Part Number: 4007851 ), ( Listing Code: L19ss25k Cta ), ( Type: Rocker Arm ), ( Oe/oem Part Number: Yes ), ( Material: Cast Iron ), ( Country Of Origin: United States )

Review MOPAR Vintage Nos Direct Connection 426 Intake Adjustable Rocker Arm fits HEMI

Mopar 4007851 NOS Connection 426 Hemi Intake Rocker Arm

The Mopar 4007851 NOS Connection 426 Hemi Intake Rocker Arm is a crucial component for any restoration or performance project involving the iconic 426 Hemi engine. This part, manufactured by Mopar, the official parts brand of FCA US LLC, is designed to deliver original equipment (OE) quality and fitment.

The intake rocker arm is responsible for converting the reciprocating motion of the piston into the rotating motion of the valves. This specific rocker arm, with the part number 4007851, is engineered for use with the Nitrous Oxide Systems (NOS) on 426 Hemi engines. The unique design includes provisions for NOS connection hoses, allowing for the efficient delivery of nitrous oxide fuel into the intake manifold.

Made from high-strength materials, this rocker arm is built to withstand the increased power and RPMs produced by nitrous oxide injection. The arm features a polished finish, enhancing the visual appeal of the engine compartment. Its precise machining ensures a perfect fit and optimal engine performance.

Installing the Mopar 4007851 NOS Connection 426 Hemi Intake Rocker Arm is a straightforward process for experienced mechanics. However, it is essential to follow the instructions provided in the installation manual carefully to ensure proper installation, as working with nitrous oxide systems requires a keen attention to detail.

In summary, the Mopar 4007851 NOS Connection 426 Hemi Intake Rocker Arm is an essential component for any 426 Hemi engine project that utilizes nitrous oxide systems. Its OE quality, NOS compatibility, and high-strength construction make it an indispensable part for enthusiasts and restoration professionals alike.

Buying a Mopar 4007851 NOS Connection 426 Hemi Intake Rocker Arm involves considering its potential benefits and drawbacks. Here's a detailed examination of each:

1. Authenticity: This rocker arm is a genuine Mopar part, ensuring a perfect fit and finish for your 426 Hemi engine.

2. Improved Performance: The NOS connection on this rocker arm is designed for use with nitrous oxide systems, which can significantly boost engine power and performance.

3. Durability: Mopar is known for manufacturing high-quality parts, and this rocker arm is no exception. It's built to withstand the increased pressure and demands of a nitrous oxide system.

1. Cost: This rocker arm is a specialized part, designed for use with high-performance applications. As a result, it may be more expensive than a standard intake rocker arm.

2. Complex Installation: Installing this rocker arm involves more than just swapping out the old one. You'll need to modify your engine and intake manifold to accommodate the NOS connection.

3. Limited Availability: This part may not be readily available at your local auto parts store, so you may need to order it online or from a specialized performance parts supplier.

The Mopar 4007851 NOS Connection 426 Hemi Intake Rocker Arm is a specialized part designed for high-performance applications, particularly those involving nitrous oxide systems. While it offers benefits such as improved performance and authenticity, it also comes with drawbacks such as cost, complex installation, and limited availability.

If you're building a high-performance 426 Hemi engine and plan to use a nitrous oxide system, this rocker arm is an excellent choice. However, if you're looking for a standard intake rocker arm, there may be more cost-effective options available. Always ensure you have the necessary skills and resources to install this part correctly.

Details:

Flat rate shipping cost is to the lower 48 states of USA only. Shelf wear - lite surface rust. Pictures are part of the.

part #: 4007851 prices

• $124.20-$134.63

specifications rockeareng:

• for models: Hemi
• for makes: Mopar
• mpn: 4007851
• listing code: L19ss25k Cta
• type: Rocker Arm
• oe/oem part number: Yes
• material: Cast Iron
• country of origin: United States

seller rockeareng:

• # reviews: 6004
• city: Allen, Michigan
• rating: 99.7%

payments rockeareng:

• other
• wallet: Apple-pay
• credit card: Mastercard

general rockeareng:

• condition: New other see details
• Engines Engine Parts > Valvetrain Components > Rocker Arms Parts

offer rockeareng:

• started: November 25, 2025
• options: Ship-to-home
• quantity: 6
• sold: 0
• availability: In Stock

shipping rockeareng:

• carrier: USPS
• class: Standard
• type: Fixed
• service: USPS Ground Advantage
• transit: 4-8 Days
• cost: $7.99

returns rockeareng:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

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