Holley Billet Aluminum Mounting Plate

2014+ Mopar Gen III Hemi Engines 5.7L / 6.1L / 6.4L

97-380

Overview:

The Holley Billet Aluminum Mounting Plate is engineered specifically for late-model Mopar Gen III Hemi engines, including the 5.7L, 6.1L, and 6.4L variants produced from 2014 and onward. Designed to address the excessive pressure output of the factory power steering pump, this mounting plate enables the installation of a low-pressure Saginaw type II power steering pump that is compatible with older muscle cars and trucks. By providing the correct pressure, it protects vintage steering boxes from damage while maintaining reliable power steering performance.

This mounting plate is ideal for enthusiasts performing Gen III Hemi engine swaps into classic vehicles, ensuring seamless integration with existing “car style” accessory drive systems. It bolts directly to the left side cylinder head using factory tapped holes, simplifying installation and preserving engine bay aesthetics.

Key Features:

Designed with precision and durability in mind, the Holley mounting plate offers the following benefits:

• Mounts low-pressure power steering pump (Holley part #198-104) on Gen III Hemi engines
• Prevents damage to older steering boxes caused by excessive factory pump pressure
• Constructed from billet aluminum with a sleek black anodized finish for corrosion resistance and style
• Utilizes existing tapped holes on the left cylinder head for a secure, bolt-on installation
• Compatible with pulley #97-383 to ensure proper pump speed and operation
• Works seamlessly with “car style” accessory drive systems found on 2014 and newer Gen III Hemi engines
• Supports engine swaps into muscle cars and trucks requiring factory low-pressure steering boxes
• Part of a complete kit option (Holley #97-382) including pump, reservoir, hardline adapter, and pulley

Construction & Design:

The mounting plate is precision-machined from high-quality billet aluminum, providing exceptional strength and durability while minimizing weight. Its black anodized finish offers long-lasting corrosion resistance and a professional appearance that complements engine bay components. The design leverages existing factory mounting points on the Gen III Hemi’s left cylinder head, ensuring a perfect fit without the need for custom fabrication or modifications.

Engineered to accommodate the Holley Saginaw type II power steering pump, the plate maintains proper alignment and pulley positioning, which is critical for optimal pump speed and system reliability. This thoughtful design supports the longevity of both the pump and the steering box, especially in classic vehicle applications.

Installation & Fitment:

Installation is straightforward for experienced mechanics and enthusiasts familiar with Gen III Hemi engines. The mounting plate bolts directly to the factory tapped holes on the left side cylinder head, requiring no drilling or permanent modifications. It is intended for use with Holley power steering pump #198-104 and pulley #97-383, which together provide the correct pressure and speed for older muscle car steering boxes.

This product is compatible with 2014 and newer Mopar Gen III Hemi engines in 5.7L, 6.1L, and 6.4L displacements, making it an excellent choice for engine swaps into classic muscle cars and trucks that retain their original low-pressure steering components.

What's Included:

• Billet aluminum mounting plate with black anodized finish

Note: The mounting plate is sold separately as part #97-380. For a complete power steering solution, consider the full kit (Holley part #97-382) which includes the pump, reservoir, mounting bracket, hardline adapter, and pulley.

Ideal For:

This mounting plate is perfect for muscle car and truck enthusiasts performing Gen III Hemi engine swaps who want to preserve their factory-style low-pressure steering boxes. It is also ideal for anyone seeking to prevent premature steering box failure caused by the high-pressure factory power steering pump on late-model Mopar engines. The product ensures reliable, correct-pressure power steering operation without compromising the classic vehicle’s original steering components.

Holley is a cornerstone name in performance, spanning everything from classic carburetion to modern EFI, fuel systems, and race-ready supporting components. It’s also home to a roster of iconic sub-brands across ignition, exhaust, and drivetrain—making Holley a one-stop ecosystem for builders chasing better drivability, more power, and proven track heritage.