fits model: Sb. make: Chevy.

( Brand: Keith Black Pistons ), ( Manufacturer Part Number: KB111-040 ), ( Fitmenttype: Performance/custom )
The Keith Pistons KB111-040 SB Flat Top Piston is a superior choice for racers and enthusiasts running Chevrolet flat head engines with a displacement of 4.040 cubic inches. This piston, specifically designed for Sprint Car applications, adheres to the regulations set by both the International Motor Contest Association (IMCA) and the United States Modified Tour Series (UMP).
Crafted with precision, the KB111-040 SB piston features a unique design that balances power, durability, and efficiency. The flat top design offers an optimized combustion chamber for improved fuel burning, while the skirts are designed to reduce friction for smoother operation and increased horsepower.
The piston is made from high-quality forged aluminum, ensuring exceptional strength and reliability under extreme racing conditions. The top ring land is reinforced to withstand the high torque and RPMs associated with Sprint Car racing. The piston also includes a fully floating wrist pin for reduced friction and increased longevity.
The Keith Pistons KB111-040 SB Flat Top Piston is an excellent choice for racers seeking a high-performance solution that meets the strict regulations of IMCA and UMP. Its combination of power, durability, and compliance makes it an ideal choice for those looking to take their Chevrolet flat head engine to the next level.
Product: Keith Pistons KB111-040 SB for Chevy Flat Top 4.040 IMCA UMP
Pros:1. High-quality pistons from a reputable brand (Keith Pistons) known for its precision and durability.
2. Specifically designed for Chevy Flat Top engines, ensuring a precise fit.
3. The 4.040-inch bore size makes it suitable for various racing applications, including IMCA UMP.
4. The piston's design may contribute to improved engine performance due to its high-quality materials and construction.
Cons:1. Potential high cost compared to some other aftermarket piston options.
2. May require additional engine modifications or adjustments to achieve optimal performance.
3. Despite the brand's reputation, there is always a risk of manufacturing defects, which could lead to engine issues.
4. Some racers may prefer custom pistons tailored to their specific engine and racing conditions.
Conclusion:The Keith Pistons KB111-040 SB pistons are a high-quality option for Chevy Flat Top engines used in IMCA UMP racing. Their precision design, durability, and brand reputation make them a popular choice among racers. However, the high cost and potential need for additional engine modifications are factors to consider.
Recommendation:If you are looking for a reliable, high-performance piston for your Chevy Flat Top engine and are willing to invest in quality, the Keith Pistons KB111-040 SB could be a good choice. However, it is essential to weigh the pros and cons carefully and consider your specific engine and racing conditions before making a purchase. If budget is a concern or if you prefer custom pistons, it may be worth exploring other options or consulting with an engine builder.
They use a 3.750 stroke crankshaft and 5.700 connecting rods. Part number KB111 040. Here is a used set of 8 KEITH BLACK hyper eutectic flat top Pistons for the Sb Chevy engines. They were a dome piston that has the milled off.
They are 4.040 bore and 1.433 compression height .