SEALED POWER R-856-2 Rocker Arms Gm 260 403 V8

( Brand: Sealed Power ), ( Manufacturer Part Number: R-856-2 ), ( Part Type: Arm )

Review SEALED POWER R-856 Rocker Arms Gm 260 403 V8 fits 330 350 400 425 455 1965–1979

Introducing the Power R-856-2 R-856 Rocker Arms, an essential upgrade for your 1965-1979 GM 260 330 350 400 403 425 455 V8 engine. These rocker arms are meticulously designed to provide superior performance and durability, enhancing the overall driving experience of your classic vehicle.

Each rocker arm is crafted with precision from high-quality steel, ensuring a robust and reliable construction. The arms are meticulously finished to provide a smooth, polished surface that reduces friction and wear. The arms are also designed with the correct length and curvature to ensure proper valve clearance and optimal engine performance.

The Power R-856-2 R-856 Rocker Arms feature roller tip technology, which reduces the load on the valve springs, resulting in smoother engine operation and improved fuel efficiency. The roller tips also reduce wear on the valve stems, ensuring longer lifespan and reduced maintenance requirements.

These rocker arms are easy to install, with a straightforward bolt-on design that requires no engine disassembly. The kit includes all necessary hardware, making installation a hassle-free experience. Additionally, the rocker arms are compatible with factory valvetrains, making them a perfect upgrade for classic GM V8 engines.

The Power R-856-2 R-856 Rocker Arms are an excellent investment for any classic car enthusiast looking to improve the performance and reliability of their 1965-1979 GM 260 330 350 400 403 425 455 V8 engine. With their robust construction, smooth operation, and easy installation, these rocker arms are sure to provide years of reliable service and enhance the driving experience of your classic vehicle.

Buying Power R-856-2 R-856 rocker arms for 1965-1979 GM 260 330 350 400 403 425 455 V8 engines comes with both advantages and disadvantages. Here are some potential points to consider:

1. Performance: Upgrading to Power R-856-2 R-856 rocker arms can improve engine performance. These rocker arms are designed for high-performance applications and can help increase horsepower and torque.

2. Durability: These rocker arms are made from high-quality materials and are designed to last longer than OEM parts. They can help reduce engine wear and tear, leading to better overall engine health.

3. Adjustability: Power R-856-2 R-856 rocker arms offer adjustability, which can help optimize engine performance. This can be especially important in high-performance applications where precise adjustments are necessary.

1. Cost: Upgrading to Power R-856-2 R-856 rocker arms can be more expensive than using OEM parts. The cost of these aftermarket parts can vary depending on the supplier and the specific engine application.

2. Installation: Installing aftermarket rocker arms can be more complex than installing OEM parts. It may require specialized tools and knowledge, which could add to the overall cost and time required for the installation.

3. Compatibility: It's important to ensure that the Power R-856-2 R-856 rocker arms are compatible with your specific engine application. Failure to do so could result in poor performance or even engine damage.

In conclusion, upgrading to Power R-856-2 R-856 rocker arms for 1965-1979 GM 260 330 350 400 403 425 455 V8 engines can offer some performance and durability benefits. However, these benefits come with additional costs and installation complexities. It's important to carefully consider these factors and ensure compatibility before making a purchase.

If you're looking to upgrade your engine for high-performance applications, upgrading to Power R-856-2 R-856 rocker arms could be a good investment. However, it's important to make sure that the benefits outweigh the costs and installation complexities for your specific application. Before making a purchase, I would recommend consulting with a professional mechanic or engine builder to help determine if these aftermarket rocker arms are the right choice for your needs.

Details:

Sometimes the fitment is so old that it does not take into account trim, engine size or build dates. Shipping:: Free Shipping is for continental USA only. 260 330 350 400 403 425 455 V8. None of which makes the part Defective.

Rubber parts, gaskets, hardware may need to be replaced and not usable. Sealed Power part number R-856-2. They may have been in storage anywhere from 1-30 years. Be sure the part you are buying is correct for your application.

ONCE Purchased YOU OWN IT. If any manufacturer warranty exists, it is between you and them. Or any other minor issue that does not make the part you are buying DEFECTIVE. There may be minor corrosion, scuffs, torn or missing boxes, scratches from storage, etc.

part #: r8562 price

• $14.36

specifications rockeareng:

• for models: 330, 350, 400, 425, 455
• for years: 1965-1979
• brand: Sealed Power
• mpn: R-856-2
• part type: Arm

shipping rockeareng:

• class: Standard
• service: USPS Ground Advantage
• carrier: USPS
• transit: 3-8 Days
• type: Fixed
• cost: $0.00

returns rockeareng:

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

offer rockeareng:

• options: Ship-to-home
• started: November 17, 2025
• availability: In Stock
• sold: 0
• quantity: 1

payments rockeareng:

• wallet: Google-pay
• credit card: Diners-club
• other

seller rockeareng:

• # reviews: 254909
• city: Houston, Texas
• rating: 99.5%

general rockeareng:

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

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