J.E. PISTONS 399159 Piston Kit 193564567635 4.320 11.5 108

( Brand: J.e. Pistons ), ( Manufacturer Part Number: 399159 ), ( Part Type: Piston ), ( Bore Size: 4.320 ), ( Compression Ratio: 11.5 ), ( Displacement: 108 ), ( Piston Material: Forged 2618 Aluminum ), ( Stroke Length: 4.500 ), ( Units: Kit ), ( Alt Mpn 1: 0910-7017 ), ( Average Delivery Time: 2-3 Days ), ( Package Weight: 3.3000 ), ( Package Length: 10.55 ), ( Package Width: 5.94 ), ( Package Height: 5.47 ), ( Manufacturer Warranty: 30 Days ), ( UPC: 193564567635 )

Review J.E. PISTONS Piston Kit 4.320 Inch Bore Stroke 11.5 108 fits M8 CR

The JE Pistons 399159 piston kit is a high-performance solution designed for engines with a displacement of 4.320 cubic inches and a compression ratio of 11.5:1. This piston kit is suitable for applications where increased power and durability are required, such as in racing or high-performance applications.

The pistons in this kit are made from forged 2618-T6 aluminum alloy, ensuring superior strength and rigidity. Each piston features a unique deck design that allows for a perfect fit in the engine cylinder, minimizing the possibility of leakage or ring fitting issues.

The piston crowns are optimized for a compression ratio of 108:1, providing excellent combustion efficiency and power output. The piston skirts are designed with an optimized radius to reduce friction and improve ring sealing, resulting in improved engine performance and longevity.

The pistons also feature a secondaries groove, which allows for the use of efficiency rings. These rings provide additional compression and improve ring sealing, resulting in improved power and fuel efficiency.

The JE Pistons 399159 piston kit includes pistons, piston pins, and piston rings. The piston pins are made from 300M steel, while the piston rings are made from top-quality materials, ensuring long-lasting performance and durability.

This piston kit is manufactured to the highest standards of quality and precision, ensuring a perfect fit and optimal performance in your engine. It is an ideal choice for high-performance applications where power, durability, and reliability are paramount.

Pros and Cons of Buying J.E. Pistons 399159 Kit for a 4.320 11.5 CR 108mm Engine

The J.E. Pistons 399159 kit is a popular choice for those looking to upgrade their engine components. Below are the pros and cons of buying this piston kit for a 4.320 11.5 CR 108mm engine.

1. High-Quality Material: J.E. Pistons are known for their high-quality materials, including forged pistons made from 2618-T6 aluminum alloy. This ensures durability and strength.

2. Improved Performance: The piston kit can help increase engine performance by reducing weight, improving compression, and reducing friction.

3. Customizable: J.E. Pistons offer custom piston designs to suit specific engine requirements. This ensures a perfect fit and optimal performance.

4. Warranty: The piston kit comes with a limited warranty, providing peace of mind and protection against manufacturing defects.

1. Cost: The J.E. Pistons 399159 kit is more expensive than OEM pistons. This may be a drawback for those on a tight budget.

2. Installation Complexity: Installing the piston kit requires specialized tools and skills, making it a more challenging DIY project than a standard oil change or air filter replacement.

3. Break-in Period: To ensure optimal performance and longevity, the pistons need to be broken in properly. This process can be time-consuming and may require additional resources.

The J.E. Pistons 399159 kit offers several advantages, such as improved performance, high-quality materials, and a customizable design. However, it comes with a higher cost, installation complexity, and a break-in period.

If you're an enthusiast looking to maximize performance and are willing to invest in high-quality components, the J.E. Pistons 399159 kit is a worthy investment. Ensure you have the necessary tools, skills, and resources to install the pistons properly and follow the recommended break-in procedure. However, if you're on a tight budget or prefer a simpler upgrade, you may want to consider other options, such as an aftermarket intake or exhaust system.

Details:

100% satisfaction guaranteed. Skirt notches for optimal clearance at bottom dead center. STROKE length 4.500. Includes two Pistons, premium ring packs, wrist pins and wire locks.

Offset pins reduce piston rock and minimize operating noise. Combined shipping available. Skirt coating reduces operating friction and wear. Piston Kit - 4.320 Bore Stroke 11.5:1 CR 108 M8 399159.

BORE SIZE4.320. Item Specifics. PART TYPE Engine Related Parts. Accumulator groove taps combustion gases below the top ring to promote more consistent, positive seal and performance.

part #: 399159 prices

• $424.25-$498.99

specifications pistondon:

• for models: M8, Cr
• brand: J.e. Pistons
• mpn: 399159
• part type: Piston
• bore size: 4.320
• compression ratio: 11.5
• displacement: 108
• piston material: Forged 2618 Aluminum
• stroke length: 4.500
• units: Kit
• alt mpn 1: 0910-7017
• average delivery time: 2-3 Days
• package weight: 3.3000
• package length: 10.55
• package width: 5.94
• package height: 5.47
• manufacturer warranty: 30 Days
• upc: 193564567635

payments pistondon:

• other
• wallet: Google-pay
• credit card: Mastercard

shipping pistondon:

• carrier: FedEx
• service: FedEx Ground / FedEx Home Delivery, FedEx 2Day, FedEx Standard Overnight
• cost: $0.00
• class: Standard, Expedited, One-day
• type: Calculated
• transit: 3-6 Days

returns pistondon:

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

offer pistondon:

• sold: 0
• started: November 1, 2025
• quantity: 3
• availability: In Stock
• options: Ship-to-home

seller pistondon:

• # reviews: 489104
• city: Hilliard, Ohio
• rating: 99.3%

general pistondon:

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

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