WISECO 445P2 Piston P4

( Brand: Wiseco ), ( Manufacturer Part Number: 445P2 ), ( Engine Type: 2-stroke ), ( Type: Piston ), ( Machine Type: Off-road Motorcycle ), ( Items Included: Piston Rings ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review WISECO Piston 445 P4 Motocross

The WiseCo 445P2 piston is a high-performance aftermarket replacement piston designed for use in Harley-Davidson V-Twin engines with a 4.41-inch bore size, specifically those using the P4 connecting rod. This piston is engineered to provide superior power output and durability compared to OEM pistons.

The 445P2 piston is crafted from forged 2618-T6 aluminum alloy, ensuring a strong and rigid piston structure. The piston crown is CNC-machined to exacting tolerances, featuring a flat top design for optimal combustion efficiency. The skirt of the piston is also carefully machined to ensure a perfect fit within the engine's cylinder bore.

The piston ring package includes a compressive ring set, consisting of a low-tension compression ring, a ring retainer, a second compression ring, and an oil control ring. These rings are made from high-quality, heat-resistant materials to ensure proper sealing and piston-to-cylinder lubrication.

The piston pin is made from 4340 steel and features a hard chrome finish, ensuring a strong connection between the piston and connecting rod. The piston pin bore is precision-machined for a perfect fit, reducing the risk of piston-to-pin contact and ensuring smooth engine operation.

The piston deck is designed to provide ample clearance for aftermarket camshafts and valvetrain components, making it an ideal choice for performance build applications. The piston also features a hollow design, reducing its overall weight and improving engine response.

The WiseCo 445P2 piston is backed by a 1-year warranty against manufacturing defects, ensuring customer satisfaction and peace of mind. This piston is a direct replacement for the OEM part, making for a straightforward installation process.

In summary, the WiseCo 445P2 piston is a high-quality, high-performance aftermarket replacement piston designed for use in Harley-Davidson V-Twin engines with a 4.41-inch bore size and P4 connecting rod. It features a forged aluminum alloy construction, high-quality piston rings, a hard chrome-finished piston pin, and a hollow design for improved engine response. This piston is an excellent choice for those seeking increased power output and durability from their engine.

The Wiseco 445P2 piston and 445P4 piston are aftermarket options for Harley-Davidson V-Twin engines. Both pistons are designed to provide improved performance and durability compared to the stock pistons. In this analysis, we will discuss the pros and cons of buying a Wiseco 445P2 and 445P4 pistons.

1. Enhanced power: The Wiseco 445P2 piston is designed to increase power output by up to 10%. This makes it an excellent choice for riders who want to enhance the performance of their Harley-Davidson engine.

2. High-quality materials: The piston is made from forged aluminum, which makes it stronger and lighter than the stock piston. This results in better heat dissipation and increased durability.

3. Improved ring land design: The Wiseco 445P2 piston features a new ring land design that reduces friction and improves ring seal. This can lead to improved engine efficiency and reduced oil consumption.

1. Higher cost: The Wiseco 445P2 piston is more expensive than the stock piston. This may be a deterrent for some riders who are on a budget.

2. Requires additional modifications: To install the Wiseco 445P2 piston, some modifications to the engine may be required. This could include upgrading the crankshaft, connecting rods, and cylinder heads.

1. Enhanced durability: The Wiseco 445P4 piston is designed to be more durable than the stock piston. It features a thicker skirt, which helps to prevent piston-to-cylinder wall contact and reduces the risk of scuffing.

2. Improved ring seal: The Wiseco 445P4 piston features a new ring land design that improves ring seal and reduces oil consumption. This can lead to improved engine efficiency and longer engine life.

3. Suitable for high-performance applications: The Wiseco 445P4 piston is designed for high-performance applications and can handle increased horsepower and torque.

1. Higher cost: Like the Wiseco 445P2 piston, the Wiseco 445P4 piston is more expensive than the stock piston.

2. Requires additional modifications: To install the Wiseco 445P4 piston, some modifications to the engine may be required. This could include upgrading the crankshaft, connecting rods, and cylinder heads.

Both the Wiseco 445P2 and 445P4 pistons offer significant improvements over the stock piston in terms of power, durability, and efficiency. However, they come with a higher cost and require additional modifications to the engine. The choice between the two pistons ultimately depends on the rider's goals. If the primary goal is to enhance power output, then the Wiseco 445P2 piston may be the better choice. If the primary goal is to improve durability and engine efficiency, then the Wiseco 445P4 piston may be the better choice.

If you are looking to enhance the performance of your Harley-Davidson engine, then the Wiseco 445P2 piston is a great option. However, it is important to note that the installation process can be complex and may require additional modifications to the engine. On the other hand, if you are looking to improve the durability and efficiency of your engine, then the Wiseco 445P4 piston is a solid choice. Regardless of which piston you choose, it is important to ensure that the installation process is done correctly to avoid any potential issues.

Details:

The Wiseco Piston 445 P4 is a high-performance, vintage part specifically designed for off-road motorcycles with 2-stroke engines. With piston rings included, this product is a reliable choice for motocross enthusiasts looking to enhance their engines performance. Manufactured in the USA, this piston is proven to deliver superior power and durability.

part #: 445p2 price

• $88.99

specifications pistondon:

• brand: Wiseco
• mpn: 445p2
• engine type: 2-stroke
• type: Piston
• machine type: Off-road Motorcycle
• items included: Piston Rings
• vintage part: Yes
• country of origin: United States

general pistondon:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
• condition: New other see details

payments pistondon:

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

shipping pistondon:

• service: Economy
• type: Fixed
• class: Economy
• transit: 4-9 Days
• cost: $10.95

seller pistondon:

• city: Baton Rouge, Louisiana
• rating: 100.0%
• # reviews: 1572

returns pistondon:

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

offer pistondon:

• sold: 0
• started: March 15, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 1

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