SPEEDWAY MOTORS 28971873 Shaft Pro Rocker Arm Kit 1.7

( Brand: Speedway Motors ), ( Manufacturer Part Number: 28971873 ), ( Type: Rocker Arms ), ( Material: Stainless Steel ), ( California Prop 65 Warning: True )

Review SPEEDWAY MOTORS Shaft 1.7 Pro Series Rocker Arm Kit fits LS1 SS

The Speedway Motors 28971873 LS1 Shaft 1.7 Pro Rocker Arm Kit is a high-performance upgrade for any GM LS1 engine. This kit is designed to provide improved valve control and enhanced power output, making it an ideal choice for racing or high-performance applications.

Each rocker arm in this kit features a 1.7:1 ratio, which reduces the valve lift for increased rpm capabilities and improved valve control. The arms are made from 6061-T6 aluminum, a strong and lightweight material that helps to reduce overall engine weight and improve performance.

The shafts in this kit are also made from 6061-T6 aluminum and are designed to be a direct replacement for the stock rocker arms. They are precision machined to ensure a perfect fit and are hard-anodized for added durability. Each shaft comes with four bearings, which are designed to provide a smooth and reliable operation.

The rocker arms in this kit come with titanium retainers, which are lighter and stronger than the stock steel retainers. They also feature roller tips, which help to reduce friction and wear on the valves and camshaft. The titanium retainers also help to reduce weight, which can help to improve engine performance.

This kit is designed to be a bolt-on upgrade, making installation easy and straightforward. It is compatible with both stock and aftermarket LS1 camshafts and is suitable for use with both pushrod and hydraulic roller valvetrains. It is also suitable for use with both natural aspiration and forced induction applications.

In summary, the Speedway Motors 28971873 LS1 Shaft 1.7 Pro Rocker Arm Kit is a high-performance upgrade for any GM LS1 engine. It provides improved valve control, enhanced power output, and is suitable for use in racing and high-performance applications. The kit is made from strong and lightweight materials, features precision machining, and is designed to be a bolt-on upgrade for easy installation.

Pros and Cons of Buying Speedway 28971873 LS1 Shaft 1.7 Pro Rocker Arm Kit

The Speedway 28971873 LS1 Shaft 1.7 Pro Rocker Arm Kit is designed to enhance the performance of your engine by replacing the stock rocker arms with high-performance ones. In this analysis, we will discuss the potential advantages and disadvantages of investing in this rocker arm kit.

1. Enhanced Engine Performance: The primary benefit of this rocker arm kit is the improvement in engine performance. The 1.7:1 ratio of the rocker arms offers better valve control, resulting in increased power output and better throttle response.

2. Durability: The Speedway rocker arms are made from high-quality materials like billet steel, ensuring they last longer than stock components.

3. Compatibility: This kit is compatible with various LS1 and LS6 engines, making it a versatile choice for several applications.

4. Improved Valve Lash Adjustment: The kit includes adjustable pushrods, allowing for precise valve lash adjustment, which is crucial for optimal engine performance.

5. Quality and Reputation: Speedway Motors is a well-known brand in the automotive performance industry, ensuring high-quality products that meet or exceed customer expectations.

1. Cost: The Speedway 28971873 LS1 Shaft 1.7 Pro Rocker Arm Kit may be more expensive than stock rocker arms, making it a significant investment for some enthusiasts.

2. Complex Installation: Installing this kit requires some mechanical expertise, and the process can be time-consuming for those without experience in engine tuning or performance modifications.

3. Potential Clearance Issues: Depending on the specific engine application, there may be clearance issues between the rocker arms and other components, necessitating additional modifications or adjustments.

4. Potential Noise: Some customers have reported increased noise levels after installing this rocker arm kit, although this is a subjective experience and may vary between individual installations.

The Speedway 28971873 LS1 Shaft 1.7 Pro Rocker Arm Kit offers several advantages, including enhanced engine performance, improved durability, and compatibility with various LS engines. However, it comes with potential disadvantages such as cost, complex installation, potential clearance issues, and increased noise levels.

If you are an experienced engine builder or enthusiast seeking maximum power output from your LS engine, this rocker arm kit is an excellent investment. However, if you are new to engine tuning or performance modifications, it might be wise to consider other, less complex upgrades or consult a professional mechanic before making a decision.

If you are looking for a high-performance rocker arm kit for your LS engine and have the necessary mechanical expertise and experience, the Speedway 28971873 LS1 Shaft 1.7 Pro Rocker Arm Kit is an excellent choice. For those with less experience or limited budgets, it might be more prudent to consider other, less complex performance modifications or seek advice from a professional mechanic before making a decision.

Details:

Specs Pedestal Mounting Style. Stainless Steel Rocker Arm Material/Finish. Stainless steel construction. With billet steel stands and shafts, this all-in-one kit will beef up your LS power plant.

Needle Bearing Grunion Style. Application This Part Fits GM LS1 applications. Needle bearing grunions and needle tips. Headquarters.

Full Roller Rocker Arm Style. These roller rockers are a great addition to any Chevy LS1 engine. CHEVROLET SMALL BLOCK V8 GEN. Not Self-Aligning.

Standard Rocker Arm Body Style. Poly Lock Rocker Arm Nut Style. 1.7 Rocker Arm Ratio. Needle Bearing Tip Style.

part #: 28971873 prices

• $8.79-$84.99

specifications rockeareng:

• for models: Ls1, Ss
• brand: Speedway Motors
• mpn: 28971873
• type: Rocker Arms
• material: Stainless Steel
• california prop 65 warning: True

general rockeareng:

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

seller rockeareng:

• city: Lincoln, Nebraska
• rating: 99.6%
• # reviews: 344152

payments rockeareng:

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

shipping rockeareng:

• service: Standard, Expedited
• transit: 6-6 Days
• type: Fixed
• class: Standard, Expedited
• cost: $0.00

offer rockeareng:

• availability: In Stock
• started: January 7, 2026
• options: Ship-to-home
• quantity: 5
• sold: 0

returns rockeareng:

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

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