J.E. PISTONS 399155 Piston Kit 193564567598 4.255 4.375 11.5 114

( Brand: J.e. Pistons ), ( Manufacturer Part Number: 399155 ), ( Part Type: Piston ), ( Bore Size: 4.255 ), ( Compression Ratio: 11.5 ), ( Displacement: 114 ), ( Piston Material: Forged 2618 Aluminum ), ( Stroke Length: 4.375 ), ( Units: Kit ), ( Alt Mpn 1: 0910-7013 ), ( Average Delivery Time: 2-3 Days ), ( Package Weight: 3.4000 ), ( Package Length: 10.00 ), ( Package Width: 6.00 ), ( Package Height: 5.50 ), ( Manufacturer Warranty: 30 Days ), ( UPC: 193564567598 )

Review J.E. PISTONS Piston Kit 4.255 Inch Bore 4.375 Stroke 11.5 114 fits M8 CR

The J.E. Pistons 399155 kit is a high-performance piston solution designed for applications requiring a piston with a bore size of 4.255 inches and a piston crown height of 4.375 inches. This piston kit is suitable for engines with a connecting rod length of 11.5 inches and a compression ratio of 11:4:1.

This piston kit from J.E. Pistons features forged pistons made from high-strength 2618-T6 aluminum alloy. This alloy provides excellent strength and durability, making it an ideal material for high-performance applications. The pistons also feature a unique, multi-point, split ring design for improved ring sealing and reduced friction.

The piston crown is designed with a dish shape to provide optimal combustion chamber volume and shape for maximum power output. The piston skirts are optimized for a snug fit in the cylinder bore, reducing friction and improving engine efficiency. The piston pin bore is precision machined for a perfect fit with the connecting rod.

The piston kit also includes high-quality, forged, triple-lipped piston rings made from chrome molybdenum alloy. These rings provide excellent sealing and durability, ensuring optimal engine performance and efficiency. The rings are also designed with a tapered, split-land design to reduce friction and improve ring seal.

The J.E. Pistons 399155 kit is a complete solution, including the pistons, piston rings, and ring end gaps. The piston rings are pre-gapped to ensure proper installation and to simplify the assembly process. The piston kit is also compatible with standard aftermarket ring compressors, making installation even easier.

In summary, the J.E. Pistons 399155 kit is a high-quality, high-performance piston solution for engines requiring a 4.255-inch bore size, 4.375-inch piston crown height, 11.5-inch connecting rod length, and a compression ratio of 11:4:1. This piston kit features forged pistons made from high-strength aluminum alloy, optimized piston crown shape, and high-quality, forged piston rings for improved engine performance and efficiency.

Buying JE Pistons 399155 Kit: A Comprehensive Analysis

The JE Pistons 399155 piston kit, with a piston diameter of 4.255 inches and a piston pin diameter of 11.5mm, is a popular choice among engine builders and enthusiasts. This analysis will provide you with the pros and cons of purchasing this piston kit, followed by a concluding recommendation.

1. High-quality materials: JE Pistons are known for their superior quality and durability. The 399155 kit is made from forged 2618 alloy, ensuring strength and resistance to heat and pressure.

2. Precision-engineered: The pistons are designed using state-of-the-art CNC machines, ensuring a perfect fit and minimal clearance for optimal engine performance.

3. Customizable: JE offers various options for piston dome shapes, skirt designs, and ring grooves to cater to different engine applications and performance goals.

4. Wide compatibility: This piston kit is suitable for various engine sizes and configurations, making it a versatile choice for various engine builds.

1. Cost: JE Pistons are generally more expensive than OEM or aftermarket alternatives. However, the superior quality and performance may justify the investment for some.

2. Complex installation: Installing aftermarket pistons can be a complex process, requiring specialized tools and expertise. It is recommended to consult a professional engine builder or mechanic for installation.

The JE Pistons 399155 piston kit offers numerous advantages, including high-quality materials, precision engineering, customizability, and wide compatibility. However, its high cost and complex installation may deter some potential buyers. Ultimately, the decision to purchase this piston kit depends on your engine build goals, budget, and expertise. If you're seeking top-tier performance and durability, the investment in JE Pistons may be worthwhile. Otherwise, consider alternative options that better fit your cost and installation constraints.

If you're looking for high-performance pistons that offer superior quality and durability, the JE Pistons 399155 kit is an excellent choice. However, if cost or installation complexity is a concern, consider researching alternative piston brands or aftermarket options that better suit your needs. Always consult with a professional engine builder or mechanic to ensure a successful engine build project.

Details:

STROKE length 4.375. PART TYPE Engine Related Parts. Accumulator groove taps combustion gases below the top ring to promote more consistent, positive seal and performance. Skirt notches for optimal clearance at bottom dead center.

Piston Kit - 4.255 Bore 4.375 Stroke 11.5:1 CR 114 M8 399155. Combined shipping available. Skirt coating reduces operating friction and wear. Item Specifics.

Offset pins reduce piston rock and minimize operating noise. Includes two Pistons, premium ring packs, wrist pins and wire locks. BORE SIZE4.255. 100% satisfaction guaranteed.

part #: 399155 price

• $474.99

specifications pistondon:

• for models: M8, Cr
• brand: J.e. Pistons
• mpn: 399155
• part type: Piston
• bore size: 4.255
• compression ratio: 11.5
• displacement: 114
• piston material: Forged 2618 Aluminum
• stroke length: 4.375
• units: Kit
• alt mpn 1: 0910-7013
• average delivery time: 2-3 Days
• package weight: 3.4000
• package length: 10.00
• package width: 6.00
• package height: 5.50
• manufacturer warranty: 30 Days
• upc: 193564567598

shipping pistondon:

• transit: 2-5 Days
• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day, FedEx Standard Overnight
• class: Standard, Expedited, One-day
• carrier: FedEx
• cost: $0.00
• type: Calculated

seller pistondon:

• # reviews: 488328
• city: Hilliard, Ohio
• rating: 99.3%

returns pistondon:

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

payments pistondon:

• credit card: Visa
• wallet: Paypal
• other

offer pistondon:

• started: October 29, 2025
• options: Ship-to-home
• availability: In Stock
• quantity: 3
• sold: 0

general pistondon:

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

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