TRW 44058-8 Rocker Arm R856A 403 V8

( Brand: Trw ), ( Manufacturer Part Number: 44058-8 ), ( Part Type: Arm ), ( Ipn: R856a )

Review TRW 44058 Rocker Arm Oldsmobile 403 V8 fits 330 350 400 425 455 1964–1980

Introducing the TRW 44058-8 44058 rocker arm, an essential component for the Oldsmobile V8 engines produced between 1964 and 1980, including the 330, 350, 400, 403, 425, and 455 models. This rocker arm is a direct OEM replacement, ensuring a perfect fit and reliable performance.

The TRW 44058-8 rocker arm is meticulously engineered to meet the highest standards of quality and durability. Each arm is precision-machined from high-strength steel, providing superior strength and resistance to wear and tear. The arms feature a smooth, polished finish that not only looks great but also reduces friction and ensures seamless operation.

The rocker arms are designed with a robust fulcrum, which securely attaches to the engine's cylinder head. The fulcrum is engineered to distribute forces evenly across the arm, reducing stress on critical engine components and improving overall engine efficiency.

This TRW rocker arm also comes with pre-installed roller bearings, which provide a smooth, self-lubricating surface for the rocker arm to move against. The bearings are designed to last, reducing the need for frequent maintenance and ensuring that your engine runs smoothly and quietly.

Installing the TRW 44058-8 rocker arm is a straightforward process. Each arm comes with new bushings and hardware, making it easy to replace worn-out components. The kit also includes clear installation instructions to guide you through the process.

In summary, the TRW 44058-8 44058 rocker arm is a high-quality, OEM replacement component designed specifically for Oldsmobile V8 engines produced between 1964 and 1980. With its superior strength, smooth operation, and easy installation, this rocker arm is an essential upgrade for any Oldsmobile enthusiast looking to restore or maintain their classic vehicle.

Pros and Cons of Buying a TRW 44058-8 44058 Rocker Arm for 1964-1980 Oldsmobile V8 Engines

a. OEM (Original Equipment Manufacturer) Replacement: This part is manufactured by TRW, an original equipment supplier for Oldsmobile, ensuring a proper fit and function.

b. Improved Performance: Worn or damaged rocker arms can cause engine misfires and poor performance. Replacing them with new ones can improve engine efficiency and power.

c. Long-Term Savings: Although the initial investment may be higher than aftermarket parts, the use of OEM parts can reduce the need for frequent repairs and save money in the long run.

d. Warranty Coverage: TRW offers a warranty on their parts, providing peace of mind and protection against manufacturing defects.

a. Cost: OEM parts, including rocker arms, are typically more expensive than aftermarket alternatives.

b. Availability: Depending on the specific model and engine size, availability of OEM rocker arms may be limited, requiring a longer waiting time for shipping.

c. Installation Complexity: Installing OEM rocker arms may require additional steps due to their precise fit and specifications, potentially increasing the time and effort needed for the repair.

When considering the purchase of a TRW 44058-8 44058 rocker arm for a 1964-1980 Oldsmobile V8 engine, it's essential to weigh the pros and cons. The benefits include the assurance of a proper fit and function, improved performance, long-term savings, and warranty coverage. However, the drawbacks include a higher cost, potential limited availability, and increased installation complexity.

If the priority is a reliable, long-lasting repair, and the budget allows, purchasing an OEM TRW 44058-8 44058 rocker arm is recommended. This choice ensures a proper fit, optimal engine performance, and peace of mind with the warranty coverage. If budget is a concern, an aftermarket alternative can be considered, but it may require more frequent repairs in the future.

Details:

TRW part number 44058-8. Shipping:: Free Shipping is for continental USA only. Sometimes the fitment is so old that it does not take into account trim, engine size or build dates. They may have been in storage anywhere from 1-30 years.

There may be minor corrosion, scuffs, torn or missing boxes, scratches from storage, etc. Be sure the part you are buying is correct for your application. None of which makes the part Defective. If any manufacturer warranty exists, it is between you and them.

ONCE Purchased YOU OWN IT. Rubber parts, gaskets, hardware may need to be replaced and not usable.

part #: 440588 prices

• $6.99-$12.23

specifications rockeareng:

• for models: 330, 350, 400, 425, 455
• for makes: Oldsmobile
• for years: 1964-1980
• brand: Trw
• mpn: 44058-8
• part type: Arm
• ipn: R856a

general rockeareng:

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

payments rockeareng:

• credit card: Visa
• wallet: Google-pay
• other

shipping rockeareng:

• type: Fixed
• service: USPS Priority Mail
• transit: 5-10 Days
• carrier: USPS
• cost: $0.00
• class: Expedited

seller rockeareng:

• rating: 99.6%
• # reviews: 264430
• city: Houston, Texas

returns rockeareng:

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

offer rockeareng:

• quantity: 1
• started: January 17, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home

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