Small Block Chevy 400 - 23° Standard Flat Top Forged Piston J181940

Small Block Chevy 407, 4.155", 6.000" rod length, -5.0cc dome volume

J181940

81940

These classic, race winning JE flat top pistons work with most aftermarket 23° heads. They have extra deep valve pockets and a low-friction skirt design. These pistons are designed to use 1/16, 1/16, 3/16 rings or 1/16, 1/16, 3mm rings, see footnote J. Includes: 350 Series use Pin #927-2500-15-51S (118g) 400 Series use Pin #927-2750-15-51S (130g) Contact Reduction Grooves Double Spiro Locks #927-042-CS Double Pin Oilers Specifications : Part #: J181940 CID: 407 Bore: 4.155 Stroke: 3.750 Rod Length: 6.000 Block Height: 9.000 Compression Height: 1.125 Compression Ratio with 58cc chamber volume: 12.5 Compression Ratio with 64cc chamber volume: 11.6 Compression Ratio with 76cc chamber volume: 10.2 Dome Volume: -5.0cc Gram Weight: 426 Footnote: Oil Rail Support is Included Oversize: .030 Recommended Ring Set (Check Proseal listing to determine oil ring tension): J10008-4155-5 With over 60 years of experience, JE Pistons is the leader in high performance forged pistons. We've built a reputation that the competition can only follow. JE has a history of manufacturing the highest quality pistons and components that professional engine builders, race teams, and high performance enthusiasts trust and rely on. The top engine builders in NASCAR, ALMS, NHRA, AMA Supercross and others choose JE Pistons over any other brand. For over 60 years, JE's position at the forefront of performance piston manufacturing has been a result of continuous research and development of unique materials, piston designs and technologies. Utilising State-Of-The-Art CNC machines for manufacturing along with purpose-designed forgings, JE is able tomaintain exacting specifications on each and every piston and hold tolerances to millionths of an inch. Also available from JE is industry-leading processes like Ultra Crown, a Digital Three Dimensional piston crown machining process and Finite Element Analysis (FEA). FEA is a computer process whereby stress and fatigue are tested on a computer model before it goes into production. JE is the only performance piston manufacturer to earn the QS-9000 quality standard which confirms that JE provides customers the highest standards in quality control. In addition, we also have State-Of-The-Art inspection equipment and testing equipment which enables us to constantly bring you, the customer, the very latest in piston design configurations.