JE PISTONS 398756 Piston Kit Compression 193564567475 4.125 4.375 12.0

( Brand: Je Pistons ), ( Manufacturer Part Number: 398756 ), ( Part Type: Piston Compression ), ( UPC: 193564567475 )

Review JE PISTONS Piston Kit Fits 4.125 In Bore 4.375 Stroke 12.0 Compression fits 125

The JE Pistons 398756 piston kit is an excellent choice for those seeking high-performance pistons for their engine. This kit is specifically designed for engines with a bore size ranging from 4.125 inches to 4.375 inches and a compression ratio of 12.0:1.

Each piston in this kit is meticulously crafted using JE's proprietary forged 2618-T6 aluminum alloy. This material offers superior strength and durability, ensuring the pistons can withstand the rigors of high-performance applications.

The piston crowns are engineered with a dish shape to provide optimal power delivery and ring grip. The piston skirts are designed with a full-length, split-pin oil ring to minimize oil consumption and ensure effective ring sealing. The piston pin bores are chamfered to make pin installation easier and to reduce friction.

Additionally, the pistons feature a piston pin retainers with a full-floating design, allowing for greater piston-to-liner clearance and reducing the risk of piston-pin contact under high load conditions. The pistons also come with PSI rings, which are designed to provide maximum ring seal under extreme conditions.

Each piston in this kit is individually weighed and balanced to ensure optimal engine performance. The pistons are also available in various weights to accommodate different engine configurations and tuning needs.

The JE Pistons 398756 piston kit is an ideal solution for performance enthusiasts looking to maximize the potential of their engine. With its superior materials, advanced design features, and meticulous manufacturing process, this piston kit is sure to deliver exceptional power, reliability, and longevity.

Pros and Cons of Buying Je Pistons 398756 Piston Kit for 4.125-4.375 12.0 Compression Engines

The Je Pistons 398756 piston kit is designed for engines with a compression ratio of 12.0 and a piston size ranging from 4.125 inches to 4.375 inches. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this piston kit.

1. High-quality materials: The pistons are made from forged aluminum, ensuring superior strength, durability, and resistance to engine heat.

2. Precision manufacturing: Each piston undergoes strict quality control measures for an accurate fit and optimal engine performance.

3. Enhanced power and torque: The pistons' design helps improve engine power and torque, allowing for better acceleration and overall vehicle performance.

4. Compatibility: This piston kit is compatible with various engine sizes and applications, making it a versatile option for various vehicle types.

5. OEM-like fit and finish: The pistons have a close fit and finish to original equipment manufacturer (OEM) parts, ensuring a seamless installation process.

1. Cost: Compared to some aftermarket options, the Je Pistons 398756 piston kit may be more expensive.

2. Requires additional components: To complete the engine build, additional components, such as connecting rods, crankshaft, and rings, may need to be purchased separately.

3. Installation complexity: Installing the pistons requires a high level of mechanical skill and experience, making it a challenging task for novice engine builders or inexperienced mechanics.

4. Potential for engine damage: If not installed correctly, the pistons could potentially cause damage to the engine or other components.

The Je Pistons 398756 piston kit offers several advantages, including high-quality materials, precision manufacturing, enhanced power and torque, compatibility, and OEM-like fit and finish. However, it comes with some drawbacks, including a higher cost compared to some aftermarket options, the need for additional components, installation complexity, and the potential for engine damage if not installed correctly.

If you have a solid understanding of engine building and are looking for high-performance pistons for your 4.125-4.375 12.0 compression engine, the Je Pistons 398756 piston kit could be an excellent investment. However, if you're new to engine building or looking for a more cost-effective option, it might be worth considering alternative aftermarket piston kits. Proceed with caution and ensure you have the necessary skills, tools, and experience for a successful installation.

Details:

Crafted from durable 2618-T6 forged aluminum, these Pistons offer superior strength and optimal grain flow, ensuring longevity reliable performance under demanding conditions. The JE Pistons Piston Kit, part number 398756, is designed for high-performance engine builds with a 4.125-inch bore and 4.375-inch stroke. Whether upgrading for increased horsepower or rebuilding an engine reliability, the JE Pistons Piston Kit provides reliable components engineered precision and longevity. The Pistons include skirt notches for precise clearance at bottom dead center, preventing contact and ensuring proper combustion chamber operation.

The forged construction enhances tensile strength, making them suitable for both street and racing applications.Each piston features a skirt coating that reduces operating friction wear, promoting smoother operation improved efficiency. Offset pins are incorporated to minimize piston rock and operating noise, contributing quieter engine performance. Built with performance in mind, these Pistons ensure that your engine maintains peak efficiency and power throughout its lifespan.Features:2618-T6 forged aluminum construction provides enhanced strength durability Skirt coating reduces friction wear for smoother operation Offset pins minimize piston rock operating noise Skirt notches allow optimal clearance at bottom dead center Accumulator groove enhances ring seal consistent compression An accumulator beneath the top captures combustion gases, helping maintain a positive output.

part #: 398756 prices

• $376.30-$474.99

specifications pistondon:

• for models: 125
• brand: Je Pistons
• mpn: 398756
• part type: Piston Compression
• upc: 193564567475

offer pistondon:

• availability: In Stock
• started: January 16, 2026
• options: Ship-to-home
• quantity: 7
• sold: 0

returns pistondon:

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

seller pistondon:

• rating: 99.6%
• # reviews: 31474
• city: Largo, Florida

payments pistondon:

• credit card: Visa
• other
• wallet: Paypal

general pistondon:

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

shipping pistondon:

• type: Fixed
• cost: $0.00
• carrier: FedEx
• service: FedEx Ground / FedEx Home Delivery
• transit: 4-7 Days
• class: Standard

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