JE Small Block Chevy 400 - 23° Standard Flat Top Forged Piston (J181938)

J181938 - SBC 4.125" PISTONS -5cc FLAT

Small Block Chevy 401, 4.125", 6.000" rod length, -5.0cc dome volume

Part Number: J181938

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 #: J181938
CID: 401
Bore: 4.125

Stroke: 3.750
Rod Length: 6.000
Block Height: 9.000
Compression Height: 1.125
Compression Ratio with 58cc chamber volume: 12.3
Compression Ratio with 64cc chamber volume: 11.4
Compression Ratio with 76cc chamber volume: 10.1
Dome Volume: -5.0cc
Gram Weight: 418
Footnote: Oil Rail Support is Included
Oversize: STD
Recommended Ring Set (Check Proseal listing to determine oil ring tension): J100F8-4185-5
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.