140349 SPORTSMAN RACING PRODUCTS Domed Piston Set

Review SPORTSMAN RACING PRODUCTS Sbc Domed Piston Set 4.040 Bore

Introducing the Sportsman Racing 140349 Domed Piston Set, a high-performance upgrade for your racing engine. This set includes four domed pistons, each precisely engineered to deliver exceptional power and efficiency.

The pistons are crafted from forged 2618-T6 aluminum alloy, known for its exceptional strength and durability. The domed design of the piston crowns increases the effective compression height, allowing for a higher compression ratio and increased power output. The piston skirts are designed with a optimized radius to reduce friction and improve ring seal.

Each piston comes with a matching forged connecting rod made from 4340 steel, which is heat treated for added strength. The rods are precision machined to ensure a perfect fit and optimal balance.

The piston pin bore is chrome molybdenum coated for added durability and reduced wear. The piston pins are made from 17-4PH stainless steel and are also chrome molybdenum coated for added strength and wear resistance.

The piston set also includes a set of ring packages, each consisting of a compression ring, oil control ring, and top ring. The rings are made from high-quality materials and are precision machined to ensure a perfect fit and optimal performance.

The Sportsman Racing 140349 Domed Piston Set is designed to fit engines with a stroke length of 4.040 inches. It is recommended for use in high-performance racing applications where maximum power output is desired. The pistons are also compatible with most aftermarket racing cylinder heads.

In summary, the Sportsman Racing 140349 Domed Piston Set is a high-performance upgrade for your racing engine, featuring forged aluminum pistons with domed crowns, forged steel connecting rods, and precision-machined ring packages. This set is designed for use in high-performance racing applications and is sure to deliver increased power and efficiency.

Pros and Cons of buying a Sportsman Racing 140349 Domed Piston Set 4.040 for Your Engine

The Sportsman Racing 140349 Domed Piston Set 4.040 is a popular choice among engine builders for various applications. This piston set comes with several advantages and disadvantages that can help you make an informed decision before making a purchase.

1. High-quality materials: The pistons are made from forged 2618-T6 aluminum alloy, ensuring durability and strength.

2. Enhanced performance: The domed piston design allows for increased compression ratio, leading to improved engine performance.

3. Precise machining: The pistons undergo rigorous machining processes to ensure perfect fitment and uniformity.

4. Wide range of applications: The 4.040 inches bore size makes this piston set suitable for various engine builds, including small block Chevy, Ford, and Chrysler applications.

5. Competitive pricing: Compared to other high-performance piston sets in the market, the Sportsman Racing 140349 Domed Piston Set 4.040 offers an attractive price point.

1. Limited skirt design: The pistons have a short skirt design, which may not be suitable for high-horsepower applications or engines with excessive cylinder pressure.

2. Requires precision installation: Due to the domed piston design and tight engine tolerances, proper installation and clearance measurements are crucial to avoid engine damage.

3. May require additional modifications: Depending on your engine build, you may need to make additional modifications such as upgraded connecting rods or different piston rings to accommodate the increased compression ratio.

The Sportsman Racing 140349 Domed Piston Set 4.040 is an excellent choice for engine builders looking for high-quality, high-performance pistons at a competitive price. While it may require some additional modifications and precise installation, the benefits of increased compression ratio, durability, and wide application range make it a worthwhile investment.

If you're building a small to medium-power engine and are in search of a reliable, high-performance piston set, the Sportsman Racing 140349 Domed Piston Set 4.040 is a strong contender. However, it's essential to ensure that your engine build and installation process meet the specific requirements of this piston set to maximize its potential and avoid any potential engine damage.

Details:

Valve angle: 23 degree. Material: aluminum. Finish: natural. Rings included: no.

Sportsman Racing products produce affordable high-performance pistons for a variety of domestic and sport compact applications.product line: 350 series dome. Oil support rail included: yes. Bore: 4.040 in. Wrist pin style: floating/press.

Compression height : 1.125 in. Wrist pin included: yes. Material style: forged. Gas ported: no.

specifications engineblocksam:

• brand: Sportsman Racing Products
• mpn: 140349
• part type: Piston
• upc: 193564244277

offer engineblocksam:

• availability: in stock
• started: october 30, 2025
• options: ship-to-home
• sold #: 12
• in stock #: 5
• prices: $699.99–$742.13
• item condition: New

returns engineblocksam:

• time: 30 days
• paid by: seller
• policy: returns accepted

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• class: standard
• service: standard
• transit: 4-6 days
• type: fixed

seller engineblocksam:

• rating: 97.3%
• # reviews: 45276
• city: saint paul, minnesota

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general engineblocksam:

• category: Auto Parts > Car Truck Accessories > Engines > Blocks