SBC Ultra GP FT Piston Set 4.030 Bore

The SBC Ultra GP FT Piston Set 4.030 Bore by JE PISTONS is engineered for small-block Chevrolet enthusiasts building high-performance street and competition engines. This forged piston set delivers the precision bore size necessary for maximum displacement gains while maintaining reliability under sustained load. Whether you're upgrading a 350 or 383 stroker platform, the 4.030 bore diameter allows you to achieve the cubic-inch target your engine combination demands without sacrificing structural integrity or ring seal quality.

JE PISTONS manufactures this ultra-duty piston set using aerospace-grade aluminum alloy and precision forging processes that yield consistent wall thickness and superior strength-to-weight ratios. The GP FT designation indicates a general-purpose, flat-top crown design optimized for naturally aspirated and moderately boosted applications, offering excellent quench characteristics and combustion chamber compatibility across a wide range of cylinder head combinations. Premium ring grooves are precisely machined to ensure proper ring seal and minimize blowby, critical factors in maintaining compression and oil control during high-RPM operation. The full set weighs 12.1 lbs and ships in compact dimensions suitable for direct storage or immediate installation.

This piston set is ideal for engine builders and performance shops executing a complete short-block assembly or significant displacement upgrade. Proper installation requires precise deck-height measurement, accurate rod-to-bore matching, and correct piston-to-valve clearance verification—especially important when paired with high-lift camshafts or non-OEM cylinder heads. The SBC Ultra GP FT Piston Set 4.030 Bore is compatible with standard small-block Chevrolet engine blocks and accepts OEM and aftermarket connecting rods within the appropriate pin diameter and length specifications. Verify your specific application details, including stroke length and connecting rod ratio, before ordering to ensure the finished assembly achieves your target compression ratio and clearance targets.