DRAG SPECIALTIES 139675 Piston Set Compression 3.498 .010 8/1

( Brand: Drag Specialties ), ( Manufacturer Part Number: 139675 ), ( Part Type: Piston Compression ), ( Warranty Details: See Manufacturer )

Review DRAG SPECIALTIES Piston Set 3.498 Inch .010 Bore 8/1 Compression Ratio Harley Davidson #139675 fits DS

Introducing the 139675 DS Piston Set by Harley-Davidson, a high-performance upgrade for your Harley-Davidson engine. This piston set is specifically designed for engines with a compression ratio of 3.498:1 and is an excellent choice for riders seeking improved power and efficiency.

Each piston in this set is meticulously crafted using a forged aluminum alloy, ensuring superior strength and durability. The piston crowns are engineered with a dish shape that optimizes combustion efficiency, while the piston skirts are designed to minimize friction and wear for enhanced power transmission.

The piston rings included in this set are made from a high-quality, heat-resistant material, ensuring a tight seal within the cylinder bore for optimal compression and efficient fuel consumption. The rings are also designed to reduce friction and promote even wear, ensuring long-lasting performance.

The piston pins are made of chrome molybdenum steel, providing exceptional strength and durability. The pins are also nitrided for added protection against wear and corrosion. The piston pin bore in the piston is engineered to ensure a precise fit with the connecting rod, reducing lateral play and ensuring smooth engine operation.

This piston set is a direct replacement for the original equipment pistons in your Harley-Davidson engine and is compatible with engines using a 3.498:1 compression ratio. The set includes four pistons and four piston rings, making it a complete solution for upgrading your engine's performance.

Installing the pistons is a straightforward process, and Harley-Davidson provides detailed instructions and guidelines to ensure a successful installation. With this piston set, you can expect improved power output, increased torque, and enhanced engine efficiency, making it an excellent investment for any serious Harley-Davidson rider.

Pros and Cons of Buying a 139675 DS Piston Set for Harley-Davidson Motorcycles

The 139675 DS Piston Set is a popular aftermarket upgrade for Harley-Davidson motorcycles. This piston set is designed to enhance the performance and durability of the engine. In this analysis, we'll discuss the pros and cons of investing in this piston set.

1. Enhanced Performance: The pistons in the 139675 DS Piston Set are designed to provide increased power and torque, resulting in improved engine performance.

2. Durability: The pistons are made from high-quality materials, such as forged aluminum, which can withstand the high temperatures and pressures encountered in a motorcycle engine, ensuring a longer service life.

3. Customization: By upgrading to the 139675 DS Piston Set, riders can tailor their engine to their specific riding style and preferences, as these pistons offer better compression ratios than stock pistons.

4. Compatibility: This piston set is compatible with a wide range of Harley-Davidson engines, making it a versatile upgrade option.

1. Cost: The 139675 DS Piston Set is a premium upgrade, and the cost may be a significant investment for some riders.

2. Installation Complexity: Installing the piston set requires specialized knowledge and tools, which may necessitate the assistance of a professional mechanic.

3. Potential Power Increase: While the power increase may be desirable for some riders, it could potentially create handling issues or instability, especially for those riding at high speeds.

4. Noise Level: The increased power output may also result in a louder exhaust note, which some riders may find objectionable.

The 139675 DS Piston Set offers several advantages, including enhanced performance, durability, and customization options. However, it also comes with some drawbacks, such as the cost, installation complexity, potential power increase, and increased noise level. Ultimately, the decision to purchase this piston set depends on the rider's priorities, budget, and riding style. If you value improved engine performance and durability and are willing to invest in a premium upgrade, the 139675 DS Piston Set may be a worthwhile investment.

If you're considering purchasing the 139675 DS Piston Set for your Harley-Davidson motorcycle, carefully evaluate your budget, riding style, and mechanical expertise. Consult with a professional mechanic to discuss the installation process and potential modifications required to accommodate the new pistons. Additionally, consider the potential impact on the handling and noise level of your motorcycle. If you determine that the benefits outweigh the drawbacks and you're prepared for the investment, the 139675 DS Piston Set can be an excellent upgrade for your Harley-Davidson.

Details:

Harley Davidson FLHC Electra Glide Classic 1981 -1982. Piston rings are not included. Harley Davidson FLHS Electra Glide Sport 1980 -1982. DS Piston Set 3.498 .010 Bore 8:1 Compression Ratio Harley Davidson #139675: Pistons come complete with wrist pins and cir clips sold in pairs.

Harley Davidson FLH Electra Glide 1978-1984.

part #: 139675 prices

• $39.99-$64.99

specifications pistondon:

• for models: Ds
• for makes: Harley, Davidson
• brand: Drag Specialties
• mpn: 139675
• part type: Piston Compression
• warranty details: See Manufacturer

shipping pistondon:

• type: Fixed
• carrier: UPS
• cost: $0.00
• class: Standard
• service: UPS Ground
• transit: 5-9 Days

offer pistondon:

• availability: In Stock
• quantity: 5
• options: Ship-to-home
• sold: 0
• started: December 31, 2025

returns pistondon:

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

payments pistondon:

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

general pistondon:

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

seller pistondon:

• rating: 99.7%
• city: Grand Rapids, Michigan
• # reviews: 664321

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