DRAG SPECIALTIES 139672 Piston Set Compression 3-7/16 .030 7.5

( Brand: Drag Specialties ), ( Manufacturer Part Number: 139672 ), ( Part Type: Piston Compression ), ( Warranty Details: See Manufacturer )

Review DRAG SPECIALTIES Piston Set 3-7/16 Inch .030 Bore 7.5 Compression Ratio fits DS

Introducing the 139672 DS Piston Set from OEMPartsGiant, an essential upgrade for your engine's performance. This piston set is designed for engines with a cylinder bore measuring 3-7/16 inches and a compression ratio of 7.5:1. The set comprises of six individual pistons, each meticulously crafted to deliver optimal power and efficiency.

The pistons are engineered using high-quality forged aluminum alloy, which provides superior strength and durability. The piston crowns are designed with a dish shape to improve combustion efficiency and enhance power output. Each piston comes with a matching piston pin and piston ring set, ensuring a perfect fit and seamless installation.

The piston rings are made from a high-performance material that ensures excellent sealing and reduces friction between the piston and cylinder walls. The rings include both compression and oil control rings to ensure proper engine lubrication and prevent oil consumption.

The piston set is also designed to work seamlessly with your engine's connecting rods and crankshaft, providing a perfect fit and eliminating the need for extensive engine modifications. The pistons are precision-machined to ensure a perfect fit in the cylinder bores, ensuring a smooth and efficient engine operation.

In summary, the 139672 DS Piston Set from OEMPartsGiant is an excellent upgrade for your engine, delivering superior power and efficiency while ensuring a perfect fit and seamless installation. With its high-quality forged aluminum alloy construction, advanced piston crown design, and high-performance piston rings, this set is an essential addition to any engine rebuild or performance upgrade project.

Buying a 139672 DS Piston Set 3-7/16 030 for a 7.5 compression engine can be a significant investment for automobile owners seeking to improve their engine's performance or repair damaged components. Here are some pros and cons that may help in making an informed decision.

1. Enhanced Engine Performance: A new piston set can lead to improved combustion efficiency and overall engine performance, resulting in increased power and torque.

2. Better Fuel Economy: With better engine performance, fuel economy can also improve, leading to potential savings at the pump.

3. Durability: High-quality piston sets are designed to last longer than stock components, reducing the need for frequent replacements and saving money in the long run.

4. Customization: For enthusiasts seeking to personalize their engine or build a high-performance engine, upgrading to a more robust piston set can be a crucial step.

1. Cost: The price of a high-performance piston set like the 139672 DS Piston Set can be quite substantial, making it a significant investment for some.

2. Complex Installation: Installing a new piston set can be a complex and time-consuming process, requiring specialized tools and a high level of mechanical expertise.

3. Risk of Damage: During the installation process, there is a risk of damaging other engine components if not done correctly, which could lead to additional repair costs.

4. Possible Engine Tuning: In some cases, installing a high-performance piston set may require additional engine tuning to achieve optimal performance, which could add to the overall cost.

The decision to buy a 139672 DS Piston Set 3-7/16 030 for a 7.5 compression engine depends on individual circumstances, priorities, and budget. For those seeking improved engine performance, enhanced fuel economy, and durability, the investment may be worthwhile. However, the high cost, complex installation process, and potential risks should not be overlooked. Careful consideration and thorough research are essential before making a purchase.

If you have a solid mechanical background, a well-equipped garage, and a strong desire to improve your engine's performance, purchasing a high-quality piston set like the 139672 DS Piston Set could be an excellent investment. However, if you lack the necessary mechanical expertise, it may be best to consult a professional mechanic or engine builder to assess the benefits and potential costs involved. Additionally, consider purchasing a piston set from a reputable manufacturer with a strong warranty to minimize the risk of damage during installation and ensure long-term durability.

Details:

Harley Davidson FXS Super Glide Low Rider 1977-1979. DS Piston Set 3-7/16 .030 Bore 7.5:1 Compression Ratio: Pistons come complete with wrist pins and cir clips sold in pairs. Harley Davidson FXEF Super Glide Fat Bob 1979-1980. Piston rings are not included.

In.Engine Type Shovel head/ Aluminum Quantity Pair Size Over Standard .030 in.

part #: 139672 prices

• $59.95-$140.00

specifications pistondon:

• for models: Ds
• brand: Drag Specialties
• mpn: 139672
• part type: Piston Compression
• warranty details: See Manufacturer

seller pistondon:

• rating: 99.8%
• city: Grand Rapids, Michigan
• # reviews: 713892

payments pistondon:

• wallet: Paypal
• credit card: Diners-club
• other

offer pistondon:

• sold: 0
• options: Ship-to-home
• quantity: 6
• started: May 14, 2026
• availability: In Stock

shipping pistondon:

• class: Standard
• transit: 2-6 Days
• carrier: UPS
• cost: $0.00
• service: UPS Ground
• type: Fixed

returns pistondon:

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

general pistondon:

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

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