LS1, LS6, Z06, 5.7L, 6.0L - FSR Flat Top Forged Piston 243018 J243018 427 c.i., 4.125" bore, 4.000" stroke, 6.125" rod length, -5.0cc dome volume LS7 4.125" PISTONS -5cc FLAT This piston set's FSR (Forged Side Relief) slipper forging design allows the use of the most popular stroke and rod combinations while eliminating reluctor wheel clearance problems. Lightweight and extremely durable, these pistons are machined for 1.5, 1.5, 3mm rings and have an inverted dome designed to achieve optimum compression ratio with forced induction applications. CR calculated with .042 gasket thickness and 0.00" deck clearanceIncludes :Pin #927-2250-15-51C (111g)Wire locks #927-073-MW Accumulator Grooves Double Forced Pin OilersContact Reduction GroovesSpecifications :Part #: J243018CID: 427 Bore: 4.125 Stroke: 4.000 Rod Length: 6.125 Block Height: 9.240 Compression Height: 1.115Compression Ratio with 64cc chamber volume: 12.1 Compression Ratio with 66cc chamber volume: 11.9 Compression Ratio with 72cc chamber volume: 11.1Dome Volume: -5.0cc Gram Weight: 440 Footnote: Oil Rail Support is Included, .927 Pin Diameter Oversize: .125Recommended Ring Set (Check Proseal listing to determine oil ring tension): J60008-4125-5 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 nique materials, piston designs and technologies. Utilising State-Of-The-Art CNC machines for manufacturing along with purpose-designed forgings, JE is able to maintain 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.
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