SKU: KBPKB134.040
UPC: 800745045904
MPN: KB134.040
The SBC Flat Top Piston Set 4.040 Bore -7cc from KB Performance Pistons is designed specifically for small-block Chevrolet builders looking for reliable high-performance internals. This piston set is suitable for engines running naturally aspirated or moderately boosted configurations, making it an excellent choice for street performance and racing applications.
The flat-top design and -7cc compression cavity allow tuners to achieve precise static compression ratios while ensuring excellent ring sealing and durability under load. KB Performance Pistons utilizes premium aluminum alloy forging processes to create components that offer exceptional strength-to-weight ratios and thermal stability. The 4.040-inch bore specification accommodates overbore blocks and pairs with standard small-block Chevrolet rod lengths for direct fitment.
This piston set is commonly specified for 383-cubic-inch stroker engines and 350-based platforms targeting 450–550 horsepower. Mechanics and engine builders appreciate the high-quality ring grooves and skirt coatings that minimize friction and extend piston life across temperature cycles. Proper clearance verification and ring end-gap adjustments are essential during installation to ensure optimal performance.
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